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0.50x+0.15(90)=0.25(132)
We move all terms to the left:
0.50x+0.15(90)-(0.25(132))=0
We add all the numbers together, and all the variables
0.50x-0.09232=0
We move all terms containing x to the left, all other terms to the right
0.50x=0.09232
x=0.09232/0.50
x=0.09232/0.50
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