15z-12z=-15

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Solution for 15z-12z=-15 equation: 



15z-12z=-15

We move all terms to the left:

15z-12z-(-15)=0

We add all the numbers together, and all the variables

3z+15=0

We move all terms containing z to the left, all other terms to the right

3z=-15

z=-15/3

z=-5

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