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awesomeimeri123 awesomeimeri123
  • 17-12-2014
  • Mathematics
Answered

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

Verified Answer :

macio06 macio06
  • 17-12-2014

To get the answer we have to solve eq.
7(5+9)=7x+79
75+7*9=7x+63
35+63=7x+63        /-63 
35=7x           /:7
5=x
The correct answer is B.

Answer Link
5sosaddict 5sosaddict
  • 17-12-2014
B
X=5

7(5+9)=7•x+7•9
(7•5)+(7•9)=7x+63
35+63=7x+63

Subtract 63 from both sides and you will be left with
35=7x
Divide each side by 7 (you pretty much just divide 35 by 7)

And x=5
Answer Link

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