15z-20=20+13z

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Solution for 15z-20=20+13z equation: 



15z-20=20+13z

We move all terms to the left:

15z-20-(20+13z)=0

We add all the numbers together, and all the variables

15z-(13z+20)-20=0

We get rid of parentheses

15z-13z-20-20=0

We add all the numbers together, and all the variables

2z-40=0

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

2z=40

z=40/2

z=20

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