Question

Find the common solution of 2x−y=4 and 5x+3y= −1.

Answer 1

Answer:

2x-y=4. ------eqn1

5x+3y=-1 --------eqn2

eqn1 ×5 === 10x-5y=20

eqn2×2 === 10x+6y=-2

(-) (-) (+)

-11y=22

y=-2

sub y=-2 in eqn1

2x-(-2)=4

2x+2=4

2x=4-2

2x=2

x=2÷2

x=1

x=1

y=-2