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OpenStudy (anonymous):
help plz
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OpenStudy (anonymous):
5x-2y + {7x-y} for x = 7 and y = -2
OpenStudy (anonymous):
@iGreen
OpenStudy (anonymous):
A.-45 B. -18 C. 63 D. 90
OpenStudy (anonymous):
@Destinymasha
OpenStudy (anonymous):
?
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OpenStudy (igreen):
\(5x-2y + (7x-y)\) \(5(7)-2(-2) + (7(7)-(-2))\) \(5(7)-2(-2) + (49+2)\) \(5(7)-2(-2) + 51\) \(35+4 + 51\) \(39 + 51\) \(90\)
OpenStudy (anonymous):
thx so much!!!
OpenStudy (igreen):
Np.
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