Question

X=2y=-7 -4x+3y=-7whats the
answer?

Answer 1

x + 2y = -7 ⇒ -4x - 8y = 28
-4x + 3y = -7 ⇒ -4x + 3y = -7
-11y = 35
-11 -11
y = -3 2/11
x + 2(-3 2/11) = -7
x - 6 4/11 = -7
+6 4/11 +6 4/11
x = -1 4/11
(x, y) = (-1 4/11, -3 2/11)

Answer 2

`\begin{cases} x+2y=-7 \ \ / *4\\ -4x+3y=-7 \end{cases}\\\\\begin{cases} 4x+8y=-28 \\ -4x+3y=-7 \end{cases}\\+-------\\11y=-35\ \ / :11\\\\y=-(35)/(11)`


`x+2y=-7 \\\\ x+2*(-(35)/(11))=-7\\ x+ (-(70)/(11))=-7\\\\ x =-7+(70)/(11)\\\\x =-(77 )/(11)+(70)/(11)\\\\x=-(7)/(11)\\\\Answer:\ \ \ \begin{cases}x=-(7)/(11) \\ y=- (35)/(11) \end{cases}`