Question

Given f(x)=3x+1, solve for x when f(x)=7

Answer 1

X = 22

Explanation:

f(x) = 3x + 1

f(7) = 3(7) + 1

= 21 + 1

= 22

Answer 2

`{ \tt{f(x) = 3x + 1}}`

• when f(x) is 7,

`{ \tt{3x + 1 = 7}} \\ \\ { \tt{3x = 6}} \\ \\ { \tt{x = (6)/(3) }} \\ \\ { \boxed{ \rm{ \: x = 2 \: }}}`