3x+30=5x=21(x=5)

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Solution for 3x+30=5x=21(x=5) equation: 



3x+30=5x=21(x=5)

We move all terms to the left:

3x+30-(5x)=0

We add all the numbers together, and all the variables

-2x+30=0

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

-2x=-30

x=-30/-2

x=+15

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