Question

solve by substitution
2x-y=7
y=2x-5

Answer 1

ok substitute
2x-(2x-5)=7

Answer 2

OK IT CAN BE SOLVED BY COLUMN METHOD

Answer 3

Its already solved for y in the 2nd equation 2x-(2x-5)=7
next combine like terms and divide by the coefficient
2x-2x+5=7
the 2x's cancel and
\[5\neq7\]

Answer 4

SEE HERE :
2x-y=7 and y=2x-5
let 2x-y = 7 equation be (1) and y=2x-5 equation be (2)
now
in the equation 2 we will transpose 2x to LHS or subtract both sides by 2x we would get:
y-2x= -5 or 2x-y=5
2x-y=7 and 2x-y=5
let us subtract both equations (1) and (2)
2x-y-2x+y=7-5
0 \[\neq\]2
hence the given equations are wrong

Answer 5

HEY GIVE ME MEDAL