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

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


Simplifying
-9(t + -9) + -1(t + 6) = 7

Reorder the terms:
-9(-9 + t) + -1(t + 6) = 7
(-9 * -9 + t * -9) + -1(t + 6) = 7
(81 + -9t) + -1(t + 6) = 7

Reorder the terms:
81 + -9t + -1(6 + t) = 7
81 + -9t + (6 * -1 + t * -1) = 7
81 + -9t + (-6 + -1t) = 7

Reorder the terms:
81 + -6 + -9t + -1t = 7

Combine like terms: 81 + -6 = 75
75 + -9t + -1t = 7

Combine like terms: -9t + -1t = -10t
75 + -10t = 7

Solving
75 + -10t = 7

Solving for variable 't'.

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

Add '-75' to each side of the equation.
75 + -75 + -10t = 7 + -75

Combine like terms: 75 + -75 = 0
0 + -10t = 7 + -75
-10t = 7 + -75

Combine like terms: 7 + -75 = -68
-10t = -68

Divide each side by '-10'.
t = 6.8

Simplifying
t = 6.8

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