840=150+0.12(a-1,250)

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Solution for 840=150+0.12(a-1,250) equation: 



840=150+0.12(a-1.250)

We move all terms to the left:

840-(150+0.12(a-1.250))=0

We add all the numbers together, and all the variables

-(150+0.12(a-1.25))+840=0



We calculate terms in parentheses: -(150+0.12(a-1.25)), so:

150+0.12(a-1.25)

determiningTheFunctionDomain
0.12(a-1.25)+150

We multiply parentheses

0.12a-0.15+150

We add all the numbers together, and all the variables

0.12a+149.85

Back to the equation:

-(0.12a+149.85)



We get rid of parentheses

-0.12a-149.85+840=0

We add all the numbers together, and all the variables

-0.12a+690.15=0

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

-0.12a=-690.15

a=-690.15/-0.12

a=5751+0.029999999999973/0.12

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