Question

solve by substitution method 3x-y=7;2x+5y+7=2​

Answer 1

Answer:

3x-y=7—1

2x+5y=-5—2

from 1,

3x=7+y

x=7+y/3—3

applying 3 into 2

2(7+y/3)+5y=-5

14+2y/6+5y=-5

14+2y+5y=-30

by solving you get answers

Answer 2

Answer:

X=30/17 Y=-29/17 is the answer.