Question

Find the value of 9u +4 given that 7u-4=3.

Simplify your answer as much as possible.
9u + 4 = 1
Х

Answer 1

`7u - 4 = 3 \\ 7u = 4 + 3 \\ 7u = 7 \\ u = (7)/(7) \\ \boxed{u = 1} \\\\f(u) = 9u + 4 \\ f(1) = 9(1) + 4 \\f(1) = 9 + 4 \\ \boxed{f(1) = 13 }`

• 13 is the right answer.

Answer 2

13

Explanation:

Given

7u - 4 = 3 ( add 4 to both sides )

7u = 7 ( divide both sides by 7 )

u = 1

Then

9u + 4 = 9(1) + 4 = 9 + 4 = 13