T=0.7(220-a)

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



=0.7(220-T)

We move all terms to the left:

-(0.7(220-T))=0

We add all the numbers together, and all the variables

-(0.7(-1T+220))=0



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

0.7(-1T+220)

We multiply parentheses

-0.7T+154

Back to the equation:

-(-0.7T+154)



We get rid of parentheses

0.7T-154=0

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

0.7T=154

T=154/0.7

T=220

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