5x=40(0.9-x)

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Solution for 5x=40(0.9-x) equation: 



5x=40(0.9-x)

We move all terms to the left:

5x-(40(0.9-x))=0

We add all the numbers together, and all the variables

5x-(40(-1x+0.9))=0



We calculate terms in parentheses: -(40(-1x+0.9)), so:

40(-1x+0.9)

We multiply parentheses

-40x+36

Back to the equation:

-(-40x+36)



We get rid of parentheses

5x+40x-36=0

We add all the numbers together, and all the variables

45x-36=0

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

45x=36

x=36/45

x=4/5

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