A(7x)+B(x+17)+C(x+28)=180

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Solution for A(7x)+B(x+17)+C(x+28)=180 equation:



(7A)+(A+17)+(A+28)=180
We move all terms to the left:
(7A)+(A+17)+(A+28)-(180)=0
We get rid of parentheses
7A+A+A+17+28-180=0
We add all the numbers together, and all the variables
9A-135=0
We move all terms containing A to the left, all other terms to the right
9A=135
A=135/9
A=15

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