-9(t-9)-(t+2)=7

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Solution for -9(t-9)-(t+2)=7 equation: 


Simplifying
-9(t + -9) + -1(t + 2) = 7

Reorder the terms:
-9(-9 + t) + -1(t + 2) = 7
(-9 * -9 + t * -9) + -1(t + 2) = 7
(81 + -9t) + -1(t + 2) = 7

Reorder the terms:
81 + -9t + -1(2 + t) = 7
81 + -9t + (2 * -1 + t * -1) = 7
81 + -9t + (-2 + -1t) = 7

Reorder the terms:
81 + -2 + -9t + -1t = 7

Combine like terms: 81 + -2 = 79
79 + -9t + -1t = 7

Combine like terms: -9t + -1t = -10t
79 + -10t = 7

Solving
79 + -10t = 7

Solving for variable 't'.

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

Add '-79' to each side of the equation.
79 + -79 + -10t = 7 + -79

Combine like terms: 79 + -79 = 0
0 + -10t = 7 + -79
-10t = 7 + -79

Combine like terms: 7 + -79 = -72
-10t = -72

Divide each side by '-10'.
t = 7.2

Simplifying
t = 7.2

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