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x+-21.79=25+43.58
We move all terms to the left:
x+-21.79-(25+43.58)=0
We add all the numbers together, and all the variables
x-21.79+-(68.58)=0
We add all the numbers together, and all the variables
x-90.37=0
We move all terms containing x to the left, all other terms to the right
x=90.37
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