.80(t-100)=150

Solution for .80(t-100)=150 equation:

Simplifying
0.80(t + -100) = 150

Reorder the terms:
0.80(-100 + t) = 150
(-100 * 0.80 + t * 0.80) = 150
(-80 + 0.80t) = 150

Solving
-80 + 0.80t = 150

Solving for variable 't'.

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

Add '80' to each side of the equation.
-80 + 80 + 0.80t = 150 + 80

Combine like terms: -80 + 80 = 0
0 + 0.80t = 150 + 80
0.80t = 150 + 80

Combine like terms: 150 + 80 = 230
0.80t = 230

Divide each side by '0.80'.
t = 287.5

Simplifying
t = 287.5