(z-15)+(2z)=180

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Solution for (z-15)+(2z)=180 equation: 



(z-15)+(2z)=180

We move all terms to the left:

(z-15)+(2z)-(180)=0

We add all the numbers together, and all the variables

2z+(z-15)-180=0

We get rid of parentheses

2z+z-15-180=0

We add all the numbers together, and all the variables

3z-195=0

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

3z=195

z=195/3

z=65

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