Question

Solve the system by substitution: 2x-y=5
-2x+y=7

Answer 1

from the first equation we get 2x = y+5
substitute that in the second equation to get
-(y+5)+y =7
solve for y and plug it back in one of the original equations to find the value of x

Answer 2

Can you help with please??

Answer 3

with what?

Answer 4

Solving

Answer 5

there is no solution to this.

Answer 6

OK thanks

Answer 7

you are welcome

Answer 8

you get -5 = 7 which is silly, hence this system of equations doesnt have a solution.
notice that the slopes of the two lines are the same.
this means they are parallel. this means they have no point of intersection and hence no solution

Answer 9

Thank you''