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2x-3*2x-3=13
We move all terms to the left:
2x-3*2x-3-(13)=0
We add all the numbers together, and all the variables
2x-3*2x-16=0
Wy multiply elements
2x-6x-16=0
We add all the numbers together, and all the variables
-4x-16=0
We move all terms containing x to the left, all other terms to the right
-4x=16
x=16/-4
x=-4
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