9+-21=3(t-7)+6t

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Solution for 9+-21=3(t-7)+6t equation:


Simplifying
9 + -21 = 3(t + -7) + 6t

Combine like terms: 9 + -21 = -12
-12 = 3(t + -7) + 6t

Reorder the terms:
-12 = 3(-7 + t) + 6t
-12 = (-7 * 3 + t * 3) + 6t
-12 = (-21 + 3t) + 6t

Combine like terms: 3t + 6t = 9t
-12 = -21 + 9t

Solving
-12 = -21 + 9t

Solving for variable 't'.

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

Add '-9t' to each side of the equation.
-12 + -9t = -21 + 9t + -9t

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

Add '12' to each side of the equation.
-12 + 12 + -9t = -21 + 12

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

Combine like terms: -21 + 12 = -9
-9t = -9

Divide each side by '-9'.
t = 1

Simplifying
t = 1

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