Question

solve by cross multiplication of 3x-2y=8,4x+3y=5​

Answer 1

Answer:

4x+3y=29 ----- (1)

6x+3y=39 ----- (2)

First use formula for cross multiplication method:

b1c2−b2c1x=c1a2−a1c2y=a2b2−a2b1−1

So, from equation (1) and (2) we can write the value of a, b and c.

3×39−3×29x=29×6−4×39y=4×3−6×3−1

117−87x=174−156y=12−18−1

30x=18y=−6−1