Dave has 15$ to spend on a book for 8$ and two birthday cards (c) for his friends. How much can he spend on each card if he buys
2 answers:
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Y = 5x + 2
y = 3x
5x + 2 = 3x
- 5x - 5x
2 = -2x
-2 - 2
-1 = x
y = 3x
y = 3(-1)
y = -3
(x, y) = (-1, -3)
y = 3x
5x + 2 = 3x
- 5x - 5x
2 = -2x
-2 - 2
-1 = x
y = 3x
y = 3(-1)
y = -3
(x, y) = (-1, -3)