Solve each equation
1. (1/3)a=-5
a=
2. 12-b=12.5
b=
3.-0.1=-10c
c=

a=-15

Step-by-step explanation:

(1/3)a=-5

a=-5/(1/3)

a=(-5/1)(3/1)

a=-15/1

a=-15

Step-by-step explanation

Look at it this way:

If you increase something by 80 percent, your multiplying it by 1.8. This goes the same way for 50 percent. If you multiply 1.8 by 1.5, you will get 2.7. Then convert 2.7 to increasing something by 170 percent. So the answer is 170 percent.