0.7*(x-20)=100

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Solution for 0.7*(x-20)=100 equation: 



0.7(x-20)=100

We move all terms to the left:

0.7(x-20)-(100)=0

We multiply parentheses

0.7x-14-100=0

We add all the numbers together, and all the variables

0.7x-114=0

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

0.7x=114

x=114/0.7

x=162+0.60000000000001/0.7

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