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-7=0.3(-4+20)+8.8x
We move all terms to the left:
-7-(0.3(-4+20)+8.8x)=0
We add all the numbers together, and all the variables
-(0.316+8.8x)-7=0
We get rid of parentheses
-8.8x-0.316-7=0
We add all the numbers together, and all the variables
-8.8x-7.316=0
We move all terms containing x to the left, all other terms to the right
-8.8x=7.316
x=7.316/-8.8
x=-5.5592705167173/6.6869300911854
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