(45+90)+(8x+21)=180

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Solution for (45+90)+(8x+21)=180 equation: 



(45+90)+(8x+21)=180

We move all terms to the left:

(45+90)+(8x+21)-(180)=0

determiningTheFunctionDomain
(8x+21)-180+(45+90)=0

We add all the numbers together, and all the variables

(8x+21)-180+135=0

We add all the numbers together, and all the variables

(8x+21)-45=0

We get rid of parentheses

8x+21-45=0

We add all the numbers together, and all the variables

8x-24=0

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

8x=24

x=24/8

x=3

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