5x-300=15(100-x)

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Solution for 5x-300=15(100-x) equation: 



5x-300=15(100-x)

We move all terms to the left:

5x-300-(15(100-x))=0

We add all the numbers together, and all the variables

5x-(15(-1x+100))-300=0



We calculate terms in parentheses: -(15(-1x+100)), so:

15(-1x+100)

We multiply parentheses

-15x+1500

Back to the equation:

-(-15x+1500)



We get rid of parentheses

5x+15x-1500-300=0

We add all the numbers together, and all the variables

20x-1800=0

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

20x=1800

x=1800/20

x=90

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