4z+15z-(-11z)+(-15z)=-15

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Solution for 4z+15z-(-11z)+(-15z)=-15 equation: 



4z+15z-(-11z)+(-15z)=-15

We move all terms to the left:

4z+15z-(-11z)+(-15z)-(-15)=0

We add all the numbers together, and all the variables

19z-(-11z)+(-15z)+15=0

We get rid of parentheses

19z+11z-15z+15=0

We add all the numbers together, and all the variables

15z+15=0

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

15z=-15

z=-15/15

z=-1

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