$MathMaster logo$

MathMaster

Home
general
find by substitution method 2x y 3 3x y 4

Question

Find by substitution method 2x-y=3 3x-y=4

120

likes

602 views

Answer to a math question Find by substitution method 2x-y=3 3x-y=4

$Expert avatar$

4.5

103 Answers

$x=\frac{3+y}{2}$

$\begin{bmatrix}3\cdot \frac{3+y}{2}-y=4\end{bmatrix}$

$\begin{bmatrix}\frac{9+y}{2}=4\end{bmatrix}$

$y=-1$

$x=\frac{3-1}{2}$

$x=1$

$x=1,y=-1$

Frequently asked questions (FAQs)

Math question: Given ∆ABC and ∆DEF, if AB = DE, AC = DF, and ∠BAC = ∠EDF, can we conclude ∆ABC ≅ ∆DEF? Justify your answer. (

+

Math Question: What is the limit of (3x^2 + 2x + 5)/(4x^2 - 6x) as x approaches 2?

+

What is the derivative of cosh(x) + sinh(x) at x = 0?

+

New questions in Mathematics

Jose bought 3/4 of oil and his sister bought 6/8, which of the two bought more oil?

The Lenovo company manufactures laptop computers, it is known that for every 60 laptops produced, 54 go on the market with the highest quality standards. If a sample of 15 laptops is taken, calculate the probability that: Exactly 2 are not of high quality

The actual length of an object is 1.3 m . If the blueprint uses a scale of 1 : 12 , what is the length of the line on the drawing?

The cost of unleaded gasoline in the Bay Area once followed an unknown distribution with a mean of $4.59 and a standard deviation of $0.10. Sixteen gas stations from the Bay Area are randomly chosen. We are interested in the average cost of gasoline for the 16 gas stations. 84. Find the probability that the average price for 30 gas stations is less than $4.55. a 0.6554 b 0.3446 c 0.0142 d 0.9858 e 0

The average number of babies born at a hospital is 6 per hour. What is the probability that three babies are born during a particular 1 hour period?

Solve : 15/16 divide 12/8 =x/y

6-35 A recent study by an environmental watchdog determined that the amount of contaminants in Minnesota lakes (in parts per million) it has a normal distribution with a mean of 64 ppm and variance of 17.6. Assume that 35 lakes are randomly selected and sampled. Find the probability that the sample average of the amount of contaminants is a) Greater than 72 ppm. b) Between 64 and 72 ppm. c) Exactly 64 ppm. d) Greater than 94 ppm.

Given (3x+2)E [2;14] how much money (in soles) does Sophia have if numerically it is the greatest value of x?

A stunt man jumps horizontally from a building to the roof of a garage that is 2 meters lower. How fast does he need to be to land on the roof of the said garage that is 3 meters away from the building?

I. Order to add 40.25+1.31+.45 what is the first action to do ?

Express the trigonometric form of the complex z = -1 + i.

ind the z-score for which 72% of the distribution's area lies between -z and z. -1.7417, 1.7417 -1.1538, 1.1538 -1.0803, 1.0803 -2.826, 2.826

(a) List the set of possible rational zeros of the polynomial function F(x) = 2x3 - 11x2 + 13x - 4. (b) Find all rational zeros of F(x). Only do part B

A person runs 175 yards per minute write a variable that represents the relationship between time and distance

a) Statistics scores are normally distributed with the mean of 75 and standard deviation of 7. What is the probability that a student scores between 80 and 88

How many cards do you expect to pull from a poker deck until you get an ACE?

Find the rule that connects the first number to the second number of each pair. Apply the rule to find the missing number in the third pair. (18 is to 22) (54 is to 26) (9 is to ?)

An invoice for €2,880 plus default interest of €48.40 was paid on October 28th. Interest rate 5.5%. When was the bill due?