Write an equation for each of these situations and then solv

Write an equation for each of these situations and then solve the equation for the unknown value. Enter the solution to the equation in the answer box.

a.) Some number is equal to 1/3 of the sum of 90,-44.2, and 63. What is the number?

b.) 4/5 of some number increased by 25 is 5 times the number. What is the number?

Solution

a. Let the number is x

x=(1/3)(90-44.2 +63)

x=108.8/3

b. Let the number be y

4y/5 +25=5y

25=21y/5

y=125/21