Question

solve using elimination method x+y=8 and 2x-y=7​

Answer 1

Question:

solve using elimination method x+y=8 and 2x-y=7​

Solution:

$x+y=8\\\\\\x=8-y \:\:\to 1 \\\\\\2x-y=7\\\\\\x=8-y (from 1)\\\\\\2(8-y)-y=7\\\\\\16-2y-y=7\\\\\\-3y+16=7\\\\\\-3y=7-16\\\\\\-3y=-9\\\\\\y=\frac{-9}{-3}\\\\\\y=\frac{9}{3}\\\\\\y=3\\\\\\x+y=8\\\\\\x+3=8\\\\\\x=8-3\\\\\\x=5$

Answer:

$\textsf{x=5}\\\\\\\textsf{y=3}$

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