Solving systems of equations by substitution.
13) -3x+3y=4
-x + y=3
Every time I go to solve it , it cancels out x and y. Need help Please.!!

Question

Solving systems of equations by substitution. 
13)  -3x+3y=4
        -x + y=3 
Every time I go to solve it , it cancels out x and y. Need help Please.!!

anonymous · Answer

-3x+3y=4 -> eqn 1
 -x + y=3  -> eqn 2

rearrange eqn 2
y=x+3

substitute eqn 2 in eqn 1
 -3x+3(x+3)=4
-3x+3x+9=4
0=-5 -> not possible

therefore, it means that the graph of these two equations do not intersect. therefore no solution :)

anonymous · Answer

exactly!!

anonymous · Answer

Okay so there is no answer at all! Thank you so much

anonymous · Answer

no problem :)