Question

Select all the systems of equations that have exactly one solution.

y = 3x + 1, y = -3x + 7
y = 3x + 1, y = x + 1
y = 3x + 1, y = 3x + 7
x + y = 10, 2x + 2y = 20
x+ y = 10, x + y = 12 ​

Answer 1

Explanation:

y=3x+1, y= -3x+7

y=1,X=1

X+y=10,2x+2y=20

X=5, y=5