$MathMaster logo$

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)

What is the formula for the area of a regular pentagon with side length 's'?

+

Math question: If triangle ABC is congruent to triangle DEF, what is one condition that guarantees equality between the two triangles?

+

What is the radian measure of the angle formed by the terminal side in the unit circle when the corresponding real number is 2?

+

New questions in Mathematics

calculate the derivative by the limit definition: f(x) = 6x^3 + 2

1. Suppose we have a good whose quantity supplied changed from 100 to 120 units when the price increased from $10 to $12 per unit. Compute the price elasticity of supply using the midpoint method

An integer is taken at random from the first 40 positive integers. What is the probability that the integer is divisible by 5 or 6?

Solve this mathematical problem if 3/5 of a roll of tape measures 2m. How long is the complete roll?

Emma is on a 50 m high bridge and sees two boats anchored below. From her position, boat A has a bearing of 230° and boat B has a bearing of 120°. Emma estimates the angles of depression to be about 38° for boat A and 35° for boat B. How far apart are the boats to the nearest meter?

4x + 8y = 5 2x + 4y = 10

In the telephone exchange of a certain university, calls come in at a rate of 5 every 2 minutes. Assuming a Poisson distribution, the average number of calls per second is: a) 1/8 b) 1/12 c) 1/10 d) 2/5 e) 1/24

A storage maker price is $2.50 per square feet. Find the price of a custom shed 4 yards long, and 5yards wide and 8 feet tall

A function is considered exponential when it has a base with positive values greater than zero and different from one, where the exponent is an unknown. An important characteristic of exponential functions is that they show rapid growth or decay as an independent variable increases or decreases. Given the function 25^(x+3)=125, it is calculated that x has the value of

9 x² + 2x + 1 = 0

Show work on 4108 divided by 4

For what values of m is point P (m, 1 - 2m) in the 2⁰ quadrant?

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

Gender and communication : Answer the question ( 1 paragraph is ok) . Please can you write about women? Compared to your other identities, how much of a role does gender play in your life? And has your own sex/gender offered you privileges or disadvantages? How so?

Let I be an interval and let f : I → R be a continuous function such that f(I) ⊂ Q. Show (in symbols) that f is constant.