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svetoff [14.1K]
3 years ago
14

Y=x-3 and 2x-4y=8 can you help me please

Mathematics
2 answers:
Simora [160]3 years ago
8 0
\left\{\begin{array}{ccc}y=x-3\\2x-4y=8\end{array}\right\\\\subtitute\ y=x-3\ to\ the\ second\ equation:\\\\2x-4(x-3)=8\\2x-4(x)-4(-3)=8\\2x-4x+12=8\\-2x+12=8\ \ \ \ |subtract\ 12\ from\ both\ sides\\-2x=-4\ \ \ \ |divide\ both\ sides\ by\ (-2)\\\boxed{x=2}\\\\put\ value\ of \x-2\ to\ the\ equation\ y=x-3:\\y=2-3=-1\\\\Answer:\boxed{x=2\ and\ y=-1}
Nana76 [90]3 years ago
7 0
y=x-3\\2x-4y=8\\\\
2x-4(x-3)=8\\
2x-4x+12=8\\
-2x=-4\\
x=2\\\\
y=2-3\\
y=-1

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