-7(t-9)-(t+8)=4

Solution for -7(t-9)-(t+8)=4 equation:

Simplifying
-7(t + -9) + -1(t + 8) = 4

Reorder the terms:
-7(-9 + t) + -1(t + 8) = 4
(-9 * -7 + t * -7) + -1(t + 8) = 4
(63 + -7t) + -1(t + 8) = 4

Reorder the terms:
63 + -7t + -1(8 + t) = 4
63 + -7t + (8 * -1 + t * -1) = 4
63 + -7t + (-8 + -1t) = 4

Reorder the terms:
63 + -8 + -7t + -1t = 4

Combine like terms: 63 + -8 = 55
55 + -7t + -1t = 4

Combine like terms: -7t + -1t = -8t
55 + -8t = 4

Solving
55 + -8t = 4

Solving for variable 't'.

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

Add '-55' to each side of the equation.
55 + -55 + -8t = 4 + -55

Combine like terms: 55 + -55 = 0
0 + -8t = 4 + -55
-8t = 4 + -55

Combine like terms: 4 + -55 = -51
-8t = -51

Divide each side by '-8'.
t = 6.375

Simplifying
t = 6.375