Answer:
x = 40
Step-by-step explanation:
fx=2x-50
Find x when fx=30
plugin values into the equation
30 = 2x - 50
combine similar term:
30 + 50 = 2x
simplify:
80 = 2x
x = 80/2
x = 40
proof: fx = 30
f(x) = 2x - 50
= 2(40) - 50
= 80 - 50
= 30
30 = 30 ok
