MathMaster logo

MathMaster

  1. Home
  2. general
  3. solve equations by equalization method x 8 2y 2x y 7
Question

Solve equations by equalization method X-8=-2y 2x+y=7

261

likes
1306 views

Answer to a math question Solve equations by equalization method X-8=-2y 2x+y=7

Expert avatar
Frederik
4.6
103 Answers
$\left\{\begin{array} { l } 3x-8=-2y \\ 2x+y=7\end{array} \right.$
$\left\{\begin{array} { l } -2y=3x-8 \\ 2x+y=7\end{array} \right.$
$\left\{\begin{array} { l } -2y=3x-8 \\ y=7-2x\end{array} \right.$
$\left\{\begin{array} { l } y=-\frac{ 3 }{ 2 }x+4 \\ y=7-2x\end{array} \right.$
$-\frac{ 3 }{ 2 }x+4=7-2x$
$x=6$
$y=7-2 \times 6$
$y=-5$
$\left( x, y\right)=\left( 6, -5\right)$
$\left\{\begin{array} { l } 3 \times 6-8=-2 \times \left( -5 \right) \\ 2 \times 6+\left( -5 \right)=7\end{array} \right.$
$\left\{\begin{array} { l } 10=10 \\ 7=7\end{array} \right.$
$\left( x, y\right)=\left( 6, -5\right)$

Frequently asked questions (FAQs)
(2^3)(2^4)
+
What is the result of applying the chain rule to find the derivative of f(g(h(x))) where f, g, and h are differentiable functions?
+
Q: Convert the number 0.000249 to scientific notation.
+
New questions in Mathematics
Find 2 numbers that the sum of 1/3 of the first plus 1/5 of the second will be equal to 13 and that if you multiply the first by 5 and the second by 7 you get 247 as the sum of the two products with replacement solution
calculate the derivative by the limit definition: f(x) = 6x^3 + 2
-8+3/5
X^2 = 25
The graph of the equation x²= 4py is a parabola with focus F(_,_) and directrix y=_____ Therefore, the graph of x²=12y is a parabola with focus F(_,_) and a directrix y=_____
Elliot opened a savings account and deposited $5000.00 as principal. The account earns 4% interest, compounded annually. How much interest will he earn after 5 years? Round your answer to the nearest cent.
If f(x) = 3x 2, what is the value of x so that f(x) = 11?
Identify a pattern in the list of numbers.Then use this pattern to find the next number. 37,31,25,19,13
4. Show that if n is any integer, then n^2 3n 5 is an odd integer
is the x element (180,270), if tanx-3cotx=2, sinx ?
Convert 78 percent to a decimal
78 percent to a decimal
Find all real numbers x that satisfy the equation \sqrt{x^2-2}=\sqrt{3-x}
form a key for your lock containing the numbers 2 2 5 8 How many different keys can you form?
A property sold for $745,000 in a co-brokered transaction. The seller has agreed to pay a 7% commission to the listing firm. The listing firm has agreed to equally split the commission with the selling firm. If the buyer’s broker will receive 8% of the selling firm’s commission, how much commission will the buyer’s broker receive? $14,900 $3725 $$37250 $18625
Oi👋🏻 Toque em "Criar Nova Tarefa" para enviar seu problema de matemática. Um dos nossos especialistas começará a trabalhar nisso imediatamente!
Evaluate ab+dc if a=56 , b=−34 , c=0.4 , and d=12 . Write in simplest form.
6(k-7) -2=5
A small box measures 10 in. by 4 in. by 6 in. high. Find the volume of the box.
Suppose a car license plate consists of 2 letters and two digits of which the first cannot be zero. How many different plates can be engraved? consider only 26 letters and 10 digits draw an example of this.

You might be interested in