Solve using addition method. 2x-y=7 x+2y=1

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Solve using addition method. 2x-y=7 x+2y=1

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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Multiply the first eqn by 2 throughout and add the two eqn to eliminate the y term
2x-y=7 therefore 4x-2y=14....(1) x+2y=1.....(2) add 1 and 2 you will get 5x=15 as 2y will be canceled out. so x=3. putting x in eqn 2 you will get 2y=-4=> y=-2.
4x -2y = 7 x + 2y = 1 Adding both 5x = 8 So x = 8/5

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Sorry, it is 4x -2y = 14 x + 2y = 1 Adding both 5x = 15 So x = 15/5 ie 3
Then as dipankar has done

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