4 years ago

Solve the literal equation for y. -12x-3y=15

2 answers:

4 0

$-12x-3y=15\ \ \ |add\ 12x\ to\ both\ sides\\\\-12x+12x-3y=15+12x\\\\-3y=12x+15\ \ \ |divide\ both\ sides\ by\ (-3)\\\\-3y:(-3)=12x:(-3)+15:(-3)\\\\\huge\boxed{y=-4x-5}$

Studentka2010 [4]4 years ago

3 0

You said that    -12x - 3y = 15

Add 3y to each side:    -12x    = 15 + 3y

Subtract 15 from each side: -12x - 15   =    3y

Divide each side by 3 :    - 4x - 5    =    y

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