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62.10=(20+0.5x)+15(20+.5x)
We move all terms to the left:
62.10-((20+0.5x)+15(20+.5x))=0
We add all the numbers together, and all the variables
-((0.5x+20)+15(.5x+20))+62.10=0
We add all the numbers together, and all the variables
-((0.5x+20)+15(.5x+20))+62.1=0
We calculate terms in parentheses: -((0.5x+20)+15(.5x+20)), so:We get rid of parentheses
(0.5x+20)+15(.5x+20)
We multiply parentheses
(0.5x+20)+15x+300
We get rid of parentheses
0.5x+15x+20+300
We add all the numbers together, and all the variables
15.5x+320
Back to the equation:
-(15.5x+320)
-15.5x-320+62.1=0
We add all the numbers together, and all the variables
-15.5x-257.9=0
We move all terms containing x to the left, all other terms to the right
-15.5x=257.9
x=257.9/-15.5
x=-16+2.5384615384615/3.974358974359
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