3x+2x-21=4(2x-3)

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Solution for 3x+2x-21=4(2x-3) equation: 



3x+2x-21=4(2x-3)

We move all terms to the left:

3x+2x-21-(4(2x-3))=0

We add all the numbers together, and all the variables

5x-(4(2x-3))-21=0



We calculate terms in parentheses: -(4(2x-3)), so:

4(2x-3)

We multiply parentheses

8x-12

Back to the equation:

-(8x-12)



We get rid of parentheses

5x-8x+12-21=0

We add all the numbers together, and all the variables

-3x-9=0

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

-3x=9

x=9/-3

x=-3

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