SOLUTION: If the line passing through the points (a, 1) and (−18, 9) is parallel to the line passing through the points (−6, 7) and (a + 2, 1), what is the value of a?

SOLUTION: If the line passing through the points (a, 1) and (−18, 9) is parallel to the line passing through the points (−6, 7) and (a + 2, 1), what is the value of a?

Algebra.Com

Question 1127520: If the line passing through the points
(a, 1) and (−18, 9)
is parallel to the line passing through the points
(−6, 7) and (a + 2, 1),
what is the value of a?
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
Parallel, the slopes equal

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