234k views
21 votes
Find the number a for which x=5 is a solution of the given equation.

x+8a=25+ax-7a

a=

User Tomasr
by
6.4k points

1 Answer

10 votes

Explanation:

x + 8a = 25 + ax - 7a

x = 5

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

5 + 8a = 25 - 2a

5 + 10a = 25

10a = 20

a = 2

User Havij
by
7.3k points
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