Question

What is the solution to the equation?

7(5 + 9) = 7 • x + 7 • 9

A.
x = 1

B.
x = 5

C.
x = 7

D.
x = 9
@k_lynn

Answer 1

Follow the rules of PEMDAS. 5+9?

Answer 2

14?

Answer 3

Right, and since the 7 is right beside the 14, that means to multiply. So whats 14x7?

Answer 4

98?

Answer 5

Yep, in PEMDAS, multiplication comes before addition, so what's 7x9?

Answer 6

63?

Answer 7

@k_lynn

Answer 8

Yep. So so far we have \[98=7x+63\]

So to help get the x by itself, we should subtract 63 from both sides of the equation. Because of that + sign in front of the 63. So:
What's 98-63?