-3(t-5)-(t+7)=3

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Solution for -3(t-5)-(t+7)=3 equation: 


Simplifying
-3(t + -5) + -1(t + 7) = 3

Reorder the terms:
-3(-5 + t) + -1(t + 7) = 3
(-5 * -3 + t * -3) + -1(t + 7) = 3
(15 + -3t) + -1(t + 7) = 3

Reorder the terms:
15 + -3t + -1(7 + t) = 3
15 + -3t + (7 * -1 + t * -1) = 3
15 + -3t + (-7 + -1t) = 3

Reorder the terms:
15 + -7 + -3t + -1t = 3

Combine like terms: 15 + -7 = 8
8 + -3t + -1t = 3

Combine like terms: -3t + -1t = -4t
8 + -4t = 3

Solving
8 + -4t = 3

Solving for variable 't'.

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

Add '-8' to each side of the equation.
8 + -8 + -4t = 3 + -8

Combine like terms: 8 + -8 = 0
0 + -4t = 3 + -8
-4t = 3 + -8

Combine like terms: 3 + -8 = -5
-4t = -5

Divide each side by '-4'.
t = 1.25

Simplifying
t = 1.25

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