20(x-5)-5(x-5)=15

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Solution for 20(x-5)-5(x-5)=15 equation: 



20(x-5)-5(x-5)=15

We move all terms to the left:

20(x-5)-5(x-5)-(15)=0

We multiply parentheses

20x-5x-100+25-15=0

We add all the numbers together, and all the variables

15x-90=0

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

15x=90

x=90/15

x=6

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