(4, -8)
1) Let's find the solution for this Linear Equations System:
Let's use the Elimination/Addition method:
9x + y = 28
3x + 3y = -12 x-3
9x + y = 28
-9x -9y = 36
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-8y = 64 Divide both sides by -8
y = -8
2) Plug into the simpler equation, the value of y=-8
9x +y = 28
9x -8 = 28
9x = 28+8
9x = 36
x= 4
3) So the solution is x=4 and y= -8