Question

solve by cross multiplication 2x+y = 35​

Answer 1

Answer:

2x+y=35 ....(1)

3x+4y=65 ....(2)

2×Eqn(2)−3×Eqn(1) we get

6x+8y−6x−3y=130−105

⇒5y=25 or y=

5

25

=5

Substitute y=5 in (1) we get

2x+5=35⇒2x=35−5=30

or x=

2

30

=15

∴x=15,y=5