Question

Find the number a for which x=5 is a solution of the given equation.

x+8a=25+ax-7a

a=

Answer 1

Explanation:

x + 8a = 25 + ax - 7a

x = 5

5 + 8a = 25 + 5a - 7a

5 + 8a = 25 - 2a

5 + 10a = 25

10a = 20

a = 2