Elimination: 3x-7y=-14 6x-14y=-28
5x+2y=45 +35x14y=315
2(3x7y=-14)= 6x-14y=-28 = 41x=287
7(5x+2y=45)= 35x+14y=315 x=7
Now I have to put the x into either of the equations and solve for y.
5(7)+2y=45
35+2y=45 35+2y=45
-35 -35
2y=10
y=5
Substitution: 2x+y=5
x-y=1
Move the 2x to the other side= y=5-2x
Then plug y into the second equation. x-(5-2)=1
5x+2y=45 +35x14y=315
2(3x7y=-14)= 6x-14y=-28 = 41x=287
7(5x+2y=45)= 35x+14y=315 x=7
Now I have to put the x into either of the equations and solve for y.
5(7)+2y=45
35+2y=45 35+2y=45
-35 -35
2y=10
y=5
Substitution: 2x+y=5
x-y=1
Move the 2x to the other side= y=5-2x
Then plug y into the second equation. x-(5-2)=1