Question

How many solutions does the system have?

3x + y = 8

2x + 2y = 8

Answer 1

One solution. Set of values (2,2)

Explanation:

3x+y=8 0r y=8-3x

2x+2y=8

substitute value of y (8-3x) in first equation into y of 2nd equation

2x+2(8-3x)=8

2x+16-6x=8

-4x=-8

x=2

solve for y.

2x+2y=8

2(2)+2y=8

4+2y=8

2y=4

y=2

Answer 2

There is one solution

Explanation:

I did the Khan Academy lesson and I got it correct.