t-3(4-t)=-21

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Solution for t-3(4-t)=-21 equation: 



t-3(4-t)=-21

We move all terms to the left:

t-3(4-t)-(-21)=0

We add all the numbers together, and all the variables

t-3(-1t+4)-(-21)=0

We add all the numbers together, and all the variables

t-3(-1t+4)+21=0

We multiply parentheses

t+3t-12+21=0

We add all the numbers together, and all the variables

4t+9=0

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

4t=-9

t=-9/4

t=-2+1/4

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