Mathematics: Given the system of equations, x + 2y = 7 x - 2y = -1 what is the solution? {(-8, -12)} or {(3, 2)} or {(-4, 6)}

Given the system of equations, x + 2y = 7 x -

Ответ:

brittanysanders

05.01.2022

(3, 2)

Step-by-step explanation:

$\underline{+\left\{\begin{array}{ccc}x+2y=7\\x-2y=-1\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad\qquad2x=6\qquad\text{divide both sides by 2}\\.\qquad\qquad\boxed{x=3}\\\\\\\text{Put the value of x to the first equation:}\\\\3+2y=7\qquad\text{subtract 3 from both sides}\\2y=4\qquad\text{divide both sides by 2}\\\boxed{y=2}$