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OpenStudy (anonymous):
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
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OpenStudy (k_lynn):
Follow the rules of PEMDAS. 5+9?
OpenStudy (anonymous):
14?
OpenStudy (k_lynn):
Right, and since the 7 is right beside the 14, that means to multiply. So whats 14x7?
OpenStudy (anonymous):
98?
OpenStudy (k_lynn):
Yep, in PEMDAS, multiplication comes before addition, so what's 7x9?
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OpenStudy (anonymous):
63?
OpenStudy (anonymous):
@k_lynn
OpenStudy (k_lynn):
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?
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