SOLUTION: 7x+y=20 3x+2y=18

Question 126855:

7x+y=20 3x+2y=18
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
3x+2y=18 now multiply the other equation by -2 & add them.
-14x-2y=-40
----------------------------
-11x=-22
x=-22/-11
x=2 answer.
3*2+2y=18
6+2y=18
2y=18-6
2y=12
y=12/6
y=6 answer.
7*2+6=20
14=6=20
20=20
RELATED QUESTIONS
3x+2y=18,y=3x (answered by Alan3354)

Solve each system. 1. 10x+6y=0 -7x+2y=31 2. 7x+5y=18 -7x-9y=4 (answered by Alan3354)

3x-2y=9... (answered by stanbon)

y=3x-1... (answered by Fombitz)

3x+2y=11... (answered by Maths68)

3x-y=2... (answered by Alan3354)

what is -4x+y=-8, 2x-2y=-14? what is 3x-2y=3, -6x+4y=-6? what is -7x+7y=7,... (answered by carter6949)

3x-2y=4=7x (answered by edjones)

2x+2y+4z=18 7x+y-5z=8 3x+7y+4z=10 solve by using gross Jordan method (answered by ikleyn)