-3(t-7)-(t+9)=5

Solution for -3(t-7)-(t+9)=5 equation:

Simplifying
-3(t + -7) + -1(t + 9) = 5

Reorder the terms:
-3(-7 + t) + -1(t + 9) = 5
(-7 * -3 + t * -3) + -1(t + 9) = 5
(21 + -3t) + -1(t + 9) = 5

Reorder the terms:
21 + -3t + -1(9 + t) = 5
21 + -3t + (9 * -1 + t * -1) = 5
21 + -3t + (-9 + -1t) = 5

Reorder the terms:
21 + -9 + -3t + -1t = 5

Combine like terms: 21 + -9 = 12
12 + -3t + -1t = 5

Combine like terms: -3t + -1t = -4t
12 + -4t = 5

Solving
12 + -4t = 5

Solving for variable 't'.

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

Add '-12' to each side of the equation.
12 + -12 + -4t = 5 + -12

Combine like terms: 12 + -12 = 0
0 + -4t = 5 + -12
-4t = 5 + -12

Combine like terms: 5 + -12 = -7
-4t = -7

Divide each side by '-4'.
t = 1.75

Simplifying
t = 1.75