Question 836843
You had the following:
y=-1x+2 and y=5-7x.
So since each right hand side is equal y
-1x + 2 = 5 - 7x
add 1x to each side
2 = 5 -6x
add -5 to each side
-3 = -6x
divide each side by -6
1/2 = x
Substitute 1/2 for x in y = 5 - 7x
y = 5 -7(1/2)
y = 5 -7/2
y = 10/2 -7/2
y = 3/2
So our solution is x = 1/2 y= 3/2 or x = 0.5 y = 1.5
This is the same as your last choice (0.5,1.5)