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45+x/2=3x
We move all terms to the left:
45+x/2-(3x)=0
We add all the numbers together, and all the variables
-3x+x/2+45=0
We multiply all the terms by the denominator
-3x*2+x+45*2=0
We add all the numbers together, and all the variables
x-3x*2+90=0
Wy multiply elements
x-6x+90=0
We add all the numbers together, and all the variables
-5x+90=0
We move all terms containing x to the left, all other terms to the right
-5x=-90
x=-90/-5
x=+18
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