45x=30(x-40)

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Solution for 45x=30(x-40) equation: 



45x=30(x-40)

We move all terms to the left:

45x-(30(x-40))=0



We calculate terms in parentheses: -(30(x-40)), so:

30(x-40)

We multiply parentheses

30x-1200

Back to the equation:

-(30x-1200)



We get rid of parentheses

45x-30x+1200=0

We add all the numbers together, and all the variables

15x+1200=0

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

15x=-1200

x=-1200/15

x=-80

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