40-7x=4x-15

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Solution for 40-7x=4x-15 equation: 



40-7x=4x-15

We move all terms to the left:

40-7x-(4x-15)=0

We get rid of parentheses

-7x-4x+15+40=0

We add all the numbers together, and all the variables

-11x+55=0

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

-11x=-55

x=-55/-11

x=+5

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