3x+2(2x+5)=30

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Solution for 3x+2(2x+5)=30 equation: 



3x+2(2x+5)=30

We move all terms to the left:

3x+2(2x+5)-(30)=0

We multiply parentheses

3x+4x+10-30=0

We add all the numbers together, and all the variables

7x-20=0

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

7x=20

x=20/7

x=2+6/7

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