Question

Solve the pair of linearequationx+2y=2 and x-3y=7 by uaing cross multiplication

Answer 1

x+2y-2=0
x-3y-7=0
by cross multiplication we get
x/(2×(-7)-(-2)(-3))=y/(-2×1-(-7)×1)=1/1×(-3)-2×1
x/(-14-6)=y/(-2+7)=1/(-3-2)
x/-20=y/5=1/-5
x=-20/-5=4
y=5/-5=-1



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