40x+100=30x+140

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Solution for 40x+100=30x+140 equation: 



40x+100=30x+140

We move all terms to the left:

40x+100-(30x+140)=0

We get rid of parentheses

40x-30x-140+100=0

We add all the numbers together, and all the variables

10x-40=0

We move all terms containing x to the left, all other terms to the right

10x=40

x=40/10

x=4

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