x(1-0.30)=40

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Solution for x(1-0.30)=40 equation: 



x(1-0.30)=40

We move all terms to the left:

x(1-0.30)-(40)=0

We add all the numbers together, and all the variables

x(0.7)-40=0

We multiply parentheses

0.7x-40=0

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

0.7x=40

x=40/0.7

x=57+0.1/0.7

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