Question

How do you solve each system by elimination 2x+3y=9, x+5y=8?

Answer 1

2x+3y=9______(1)

x+5y=8________(2)

5 (2x+3y=9)

3 (x+5y=8)

10x+15y=45_____(1)

3x+15y=24________(2)

- - -

________________

7x=21

x=21/7

x=3

x=3 in equation ___(1)

2x+3y=9_____(1)

2(3)+3y=9

6+3y=9

3y=9-6

3y=3

y=1

hence proof