21v+8-12v-7+3t-t=

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Solution for 21v+8-12v-7+3t-t= equation:


Simplifying
21v + 8 + -12v + -7 + 3t + -1t = 0

Reorder the terms:
8 + -7 + 3t + -1t + 21v + -12v = 0

Combine like terms: 8 + -7 = 1
1 + 3t + -1t + 21v + -12v = 0

Combine like terms: 3t + -1t = 2t
1 + 2t + 21v + -12v = 0

Combine like terms: 21v + -12v = 9v
1 + 2t + 9v = 0

Solving
1 + 2t + 9v = 0

Solving for variable 't'.

Move all terms containing t to the left, all other terms to the right.

Add '-1' to each side of the equation.
1 + 2t + -1 + 9v = 0 + -1

Reorder the terms:
1 + -1 + 2t + 9v = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 2t + 9v = 0 + -1
2t + 9v = 0 + -1

Combine like terms: 0 + -1 = -1
2t + 9v = -1

Add '-9v' to each side of the equation.
2t + 9v + -9v = -1 + -9v

Combine like terms: 9v + -9v = 0
2t + 0 = -1 + -9v
2t = -1 + -9v

Divide each side by '2'.
t = -0.5 + -4.5v

Simplifying
t = -0.5 + -4.5v

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