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5x+2x=4+18
We move all terms to the left:
5x+2x-(4+18)=0
We add all the numbers together, and all the variables
5x+2x-22=0
We add all the numbers together, and all the variables
7x-22=0
We move all terms containing x to the left, all other terms to the right
7x=22
x=22/7
x=3+1/7
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