7x=45-3(12-x)

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Solution for 7x=45-3(12-x) equation: 



7x=45-3(12-x)

We move all terms to the left:

7x-(45-3(12-x))=0

We add all the numbers together, and all the variables

7x-(45-3(-1x+12))=0



We calculate terms in parentheses: -(45-3(-1x+12)), so:

45-3(-1x+12)

determiningTheFunctionDomain
-3(-1x+12)+45

We multiply parentheses

3x-36+45

We add all the numbers together, and all the variables

3x+9

Back to the equation:

-(3x+9)



We get rid of parentheses

7x-3x-9=0

We add all the numbers together, and all the variables

4x-9=0

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

4x=9

x=9/4

x=2+1/4

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