Question

x-6y=25
2x-7y=30
how to do this problem using the substitution method?

Answer 1

x=25+6y now substitute in eq.2

Answer 2

well i actually did the work but i get x=1 and y=-13/3
but when i plug the number into the equations y does not match

Answer 3

x=25+6y

2x= 50+12y

50+12y-7y = 30
50+5y=30
5y=-20
y=-4

x= 25 - 24
x=1

Answer 4

-2(x-6y=25)
2x-7y=30
-----------
5y = -20

y = -4

x-6y=25
-4
--------
x+24=25

x = 1