Question

If f(x) = x – 2 and g(x) = –2x + 7, what value of x makes f(x) = g(x)?

Answer 1

X=3

Explanation:

x=3

3-2 = -2(3)+7

1 = -6+7

1 = 1

Therefore, f(3) = g(3).

Answer 2

Answer: The value of 3 for x will make f(x)=g(x)

Explanation:

Make them equal each other and solve for x.

x-2= -2x +7 Add 2x to both sides

+2x +2x

3x - 2= 7

+2 +2

3x = 9

x = 3

Check.

F(3) = 3-2

f(3) = 1

g(3) = -2(3) + 7

g(3) = -6+ 7

g(3) = 1