Solve the equation by the Addition Method x-2y=-1 -x+5y=4

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x - 2y = -1    -x +5y=  4------------ I will now add the 2 equations0 + 3y = 3      3y = 3        y = 1substitute 1 for y in original equations to find xx- 2y = -1x - 2 (1) = -1x- 2       = -1x           = -1+2x = 1The solution is the ordered pair (1,1)