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128.15=(x+6.40+4.80)11
We move all terms to the left:
128.15-((x+6.40+4.80)11)=0
We add all the numbers together, and all the variables
-((x+11.2)11)+128.15=0
We calculate terms in parentheses: -((x+11.2)11), so:We get rid of parentheses
(x+11.2)11
We multiply parentheses
11x+123.2
Back to the equation:
-(11x+123.2)
-11x-123.2+128.15=0
We add all the numbers together, and all the variables
-11x+4.95=0
We move all terms containing x to the left, all other terms to the right
-11x=-4.95
x=-4.95/-11
x=2.5384615384615/5.6410256410256
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