Question

Using cross multiplication solve
4x-3y=0
2x+3y=18

Answer 1

4x-3y=0
4x=3y-------(1)

2x+3y=18
2x+4x=18
6x=18
x=3

y=4x/3=4

Answer 2

4x-3y-0=0
2x+3y-18=0

$\frac{x}{( - 3 \times - 18) - (3 \times 0)} = \frac{4}{(4 \times - 18) - (2 \times 0)} = \frac{1}{(2 \times - 3) - (4 \times 3)}$
$\frac{x}{54 } = \frac{y}{ - 72} = \frac{1}{ - 18}$
x=3 and y=4...