3.x+7=(4.2x-1)

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Solution for 3.x+7=(4.2x-1) equation: 



3.x+7=(4.2x-1)

We move all terms to the left:

3.x+7-((4.2x-1))=0



We calculate terms in parentheses: -((4.2x-1)), so:

(4.2x-1)

We get rid of parentheses

4.2x-1

Back to the equation:

-(4.2x-1)



We get rid of parentheses

3.x-4.2x+1+7=0

We add all the numbers together, and all the variables

-1.2x+8=0

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

-1.2x=-8

x=-8/-1.2

x=6+0.8/1.2

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