SOLUTION: The lines 2x + ay + 2b = 0 and ax - y - b = 1 intersect at the point (-1, 3). What is 2a + b?

SOLUTION: The lines 2x + ay + 2b = 0 and ax - y - b = 1 intersect at the point (-1, 3). What is 2a + b?

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Question 351551: The lines 2x + ay + 2b = 0 and ax - y - b = 1 intersect at the point
(-1, 3). What is 2a + b?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Plug the point into each equation,

1.
.
.
.

2.
Multiply eq. 2 by (-1) and add to eq. 1,

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