Math
Solve for both systems: 4y+12x=112 and -4y + 7x = 40
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Asked by
AnneS2
Last updated by
anonymous
4y+12x=112
4y+12x-12x=112-12x
4y=112-12x
4y/4=112-12x/4
y=28-3x
-4y + 7x = 40
-4(28-3x) + 7x = 40
-4(28) (-4)(-3x) + 7x = 40
-112+12x+7x=40
-112+19x=40
-112+19x+112=40+112
19x=152
19x/19=152/19
x=8
y=28-3x
y=28-3(8)
y=28-24=4