3x=4(x-10)

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Solution for 3x=4(x-10) equation: 



3x=4(x-10)

We move all terms to the left:

3x-(4(x-10))=0



We calculate terms in parentheses: -(4(x-10)), so:

4(x-10)

We multiply parentheses

4x-40

Back to the equation:

-(4x-40)



We get rid of parentheses

3x-4x+40=0

We add all the numbers together, and all the variables

-1x+40=0

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

-x=-40

x=-40/-1

x=+40

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