Question

Which number from the set {9, 10, 13, 15} is the solution to this equation? 3(x − 7) = 9

Answer 1

Answer:

10

Step-by-step explanation:

$3(x - 7) = 9 \\ 3x - 21 = 9 \\ 3x = 9 + 21 \\ 3x = 30 \\ x = \frac{30}{3} \\ x = 10 \\ x = \{10 \}$

Hence 10 forms the set in the solution of given equation.

Answer 2

Answer:

10 because you have to divide 3 on both sides so that leaves

x - 7 = 3

the add 7 to both sides so x = 10