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rusak2 [61]
2 years ago
8

5/3=23/6n+7/4-7/2n How to solve?

Mathematics
1 answer:
ser-zykov [4K]2 years ago
7 0

\dfrac{5}{3}=\dfrac{23}{6}n+\dfrac{7}{4}-\dfrac{7}{2}n\\\\LCM(2,\ 3,\ 4,\ 6)=12\\\\\dfrac{5}{3}=\dfrac{23}{6}n+\dfrac{7}{4}-\dfrac{7}{2}n\ \ \ \ |\cdot12\\\\12\cdot\dfrac{5}{3}=12\cdot\dfrac{23}{6}n+12\cdot\dfrac{7}{4}-12\cdot\dfrac{7}{2}n\\\\4\cdot5=2\cdot23n+3\cdot7-6\cdot7n\\\\20=46n+21-42n\\\\20=4n+21\ \ \ \ |-21\\\\-1=4n\ \ \ \ |:4\\\\\boxed{n=-\dfrac{1}{4}}

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Answer:

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Step-by-step explanation:

we have

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-3x+y=9\\2x-y=-6\\------\\-3x+2x=9-6\\-x=3\\x=-3

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