Question

Find x if: a+b=c and a=2x+5 b=3x-6 c=24 then x=

Answer 1

x=5

Explanation:

When given multiple equations, substitution is the best choice.

1) a+b=c

2) a=2x+5

3) b=3x-6

4) c=24

We can use equations 2, 3, and 4, to substitute equation 1.

2x+5+3x-6 = 24

Combine like terms

5x-1=24

5x=25

x=5