135=0.7(220-a)

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Solution for 135=0.7(220-a) equation: 



135=0.7(220-a)

We move all terms to the left:

135-(0.7(220-a))=0

We add all the numbers together, and all the variables

-(0.7(-1a+220))+135=0



We calculate terms in parentheses: -(0.7(-1a+220)), so:

0.7(-1a+220)

We multiply parentheses

-0.7a+154

Back to the equation:

-(-0.7a+154)



We get rid of parentheses

0.7a-154+135=0

We add all the numbers together, and all the variables

0.7a-19=0

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

0.7a=19

a=19/0.7

a=27+0.1/0.7

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