Solve x-y=1 and 2x-3y=5 by cross multiplication mathod
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1/2 = -1/-3 = 5/1
X/(-1-15) = y/(10-1) = 1/(6+2)
X/(-16) = y/9 = 1/9
X/(-16) = 1/9 y/9 = 1/9
X = 1/9×(-16) y/9 = 1/9
X = -16/9 y = 1
X/(-1-15) = y/(10-1) = 1/(6+2)
X/(-16) = y/9 = 1/9
X/(-16) = 1/9 y/9 = 1/9
X = 1/9×(-16) y/9 = 1/9
X = -16/9 y = 1
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