3x+5(30-x)=30(4.2)

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Solution for 3x+5(30-x)=30(4.2) equation: 



3x+5(30-x)=30(4.2)

We move all terms to the left:

3x+5(30-x)-(30(4.2))=0

We add all the numbers together, and all the variables

3x+5(-1x+30)-(30(4.2))=0

We add all the numbers together, and all the variables

3x+5(-1x+30)-126=0

We multiply parentheses

3x-5x+150-126=0

We add all the numbers together, and all the variables

-2x+24=0

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

-2x=-24

x=-24/-2

x=+12

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