Question

5x+7y=19
2x-3y=-4
solve by cross multiplication method​

Answer 1

Answer:

10x+14y=38

10X-15Y=-20

Y=58

2X+4=3*58

2X=170

X=85

Answer 2

Step-by-step explanation:

5x+7y=19...(1)

2x-3y= -4...(2)

Multiply (1) by 3 and (2) by 7 and add them up.

(5x+7y)3+7(2x-3y)= 57+7(-4)=>15x+14x=29 =>29x=29=>x= 29/29=1. Substitute x=1 in (1) =>5(1)+7y=19=>7y=19-5=14=>y=14/7=2. Hence the solution of x and y for this pair of equations =>x=1 and y=2. Hope it helps you.