5x-2x=1 6x+y=8 linear equation in two unknowns Solving equations by adding and subtracting

5x-2y=1①
6x+y=8②
① + 2 × 2
17x=17
x=1③
③ Substituting in (1), we get
5-2y=1
2y=4
y=2
therefore
x=1
y=2

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