Question

3x+4y=7
2x+y=-2
elimnation

Answer 1

3x+4y=7 ---------(1)

2x+y=-2 ----------(2)

By multiplying 4 in equn. (2)

4(2x+y=-2)

8x+4y=-8 ---------(3)

By substracting equn. (1) from equn (3)

8x+4y=-2

-3x-4y=-7

_________

5x. =-9

x=-9/5