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5x+40=54x+340
We move all terms to the left:
5x+40-(54x+340)=0
We get rid of parentheses
5x-54x-340+40=0
We add all the numbers together, and all the variables
-49x-300=0
We move all terms containing x to the left, all other terms to the right
-49x=300
x=300/-49
x=-6+6/49
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