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

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

k_lynn · Answer

Follow the rules of PEMDAS.  5+9?

anonymous · Answer

14?

k_lynn · Answer

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

anonymous · Answer

98?

k_lynn · Answer

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

anonymous · Answer

63?

anonymous · Answer

@k_lynn

k_lynn · Answer

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: |dw:1424460504651:dw|
What's 98-63?