0.5*x*(2x)-7=102

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Solution for 0.5*x*(2x)-7=102 equation: 



0.5x(2x)-7=102

We move all terms to the left:

0.5x(2x)-7-(102)=0

We add all the numbers together, and all the variables

0.5x2x-109=0

We move all terms containing x to the left, all other terms to the right

0.5x2x=109

x=109/1

x=109

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