Question

calcule o valor de x para que a função f (x) = 2x-10
a) F(X) = 8
b( F(X) = 10
C) F(X) = 0
D) F(X) = -2 ​

Answer 1

A) 8 = 2x - 10

8 + 10 = 2x

18 = 2x

18/2 = x

9 = x

B) 10 = 2x - 10

10 + 10 = 2x

20 = 2x

20/2 = x

10 = x

C) 0 = 2x - 10

10 = 2x

5 = x

D) -2 = 2x - 10

8 = 2x

4 = x