Mathematics
10 Online
OpenStudy (anonymous):
What is the solution to the equation?
5(8 + 7) = 5 • x + 5 • 7
A.
x = 1
B.
x = 5
C.
x = 7
D.
x = 8
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OpenStudy (hysusonic):
what do you think we do first?
OpenStudy (anonymous):
Add 8 and 7 together then multiply the answer by 5 first.
OpenStudy (anonymous):
ok
OpenStudy (anonymous):
so i got 20
OpenStudy (anonymous):
so what do i do next
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OpenStudy (anonymous):
No that's not correct. add 8 and 7 together then multiply the answer by 5
OpenStudy (anonymous):
oh ok
OpenStudy (anonymous):
75
OpenStudy (anonymous):
ok i got it it is a x=1
OpenStudy (anonymous):
am i right
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OpenStudy (ghostgate):
Hold on, let me check.
OpenStudy (ghostgate):
It would be x = 8.
Here's why:
5(8 + 7) = 5 * x + 5 x 7
5(15) = 5x + 35
75 = 5x + 35
40 = 5x
8 = x
or
x = 8
OpenStudy (ghostgate):
Because 5 x 8 = 40, plus 7 x 8 which is 35 = 75. Which 5(8 + 7) = 75.
So 75 = 75.
OpenStudy (anonymous):
oh ok thank you very much
OpenStudy (ghostgate):
You're welcome! ;)
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OpenStudy (anonymous):
i am good at math but this one was hard i have one more problem if you can help
OpenStudy (anonymous):
Use the distributive property to rewrite the expression and solve.
6 94 = 6 + 6 4 =
OpenStudy (ghostgate):
Is it 6 x 94 or what?
OpenStudy (ghostgate):
@taylor_152d can you please explain what it is? The spaces don't help identify the equation.
OpenStudy (anonymous):
ok
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OpenStudy (anonymous):
it says 6x94=6__?_+6x4=---?-
OpenStudy (ghostgate):
Well, 6 x 94 = 564. Hmmm, as for 6 x 4 = 24 + _ = ___. Hmmm.
OpenStudy (ghostgate):
Does 24 + _ = 564? If so, that can help narrow the problem.