45x=40x+20

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Solution for 45x=40x+20 equation: 



45x=40x+20

We move all terms to the left:

45x-(40x+20)=0

We get rid of parentheses

45x-40x-20=0

We add all the numbers together, and all the variables

5x-20=0

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

5x=20

x=20/5

x=4

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