40=7x(-4)

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Solution for 40=7x(-4) equation: 



40=7x(-4)

We move all terms to the left:

40-(7x(-4))=0



We calculate terms in parentheses: -(7x(-4)), so:

7x(-4)

We multiply parentheses

-28x

Back to the equation:

-(-28x)



We get rid of parentheses

28x+40=0

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

28x=-40

x=-40/28

x=-1+3/7

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