Question

Solve using cross multiplication method - 3x+ y 13 and x - 3y +9-0

Answer 1

-3x+y=13 (1)

x-3y=-9 (2)

x y 1

1 -13 -3 1

-3 9 1 -3

x/1×9-(-3)(-13)=y/-13×1-9×-3=1/-3×(-3)-1

x/9-39=y/-13+27=1/9-1

x/-30=y/14=1/8

x/-30=1/8

x=-30/8

y/14=1/8

y=14/8

Answer 2

Step-by-step explanation:

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