12-9(t+2)+3t=15(t-1)-21t

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Solution for 12-9(t+2)+3t=15(t-1)-21t equation: 



12-9(t+2)+3t=15(t-1)-21t

We move all terms to the left:

12-9(t+2)+3t-(15(t-1)-21t)=0

We add all the numbers together, and all the variables

3t-9(t+2)-(15(t-1)-21t)+12=0

We multiply parentheses

3t-9t-(15(t-1)-21t)-18+12=0



We calculate terms in parentheses: -(15(t-1)-21t), so:

15(t-1)-21t

We add all the numbers together, and all the variables

-21t+15(t-1)

We multiply parentheses

-21t+15t-15

We add all the numbers together, and all the variables

-6t-15

Back to the equation:

-(-6t-15)



We add all the numbers together, and all the variables

-6t-(-6t-15)-6=0

We get rid of parentheses

-6t+6t+15-6=0

We add all the numbers together, and all the variables

9!=0

There is no solution for this equation

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