Question

by cross multiplication method 2x+y-7=0 4x-3y+1=0​

Answer 1

In this question,,A1=2,,B1=1,,C1=-7,,&,,A2=4,,B2=-3,,C2=1

By cross multiplication method,,

X=B1C2-C1B2/A1B2-B1A2

=(1)(1)-(-7)(-3)/(2)(-3)-(1)(4)

=1-21/-6-4

=-20/-10

=2

Y=C1A2-A1C2/A1B2-B1A2

=(-7)(4)-(2)(1)/-10

=-28-2/-10

=-30/-10

=3 Ans...

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