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2x+5x=2x+4
We move all terms to the left:
2x+5x-(2x+4)=0
We add all the numbers together, and all the variables
7x-(2x+4)=0
We get rid of parentheses
7x-2x-4=0
We add all the numbers together, and all the variables
5x-4=0
We move all terms containing x to the left, all other terms to the right
5x=4
x=4/5
x=4/5
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