b
Step-by-step explanation: i don know
3x+4y = 15
4y = -3x + 15
y = -3x/4 + 15/4
y = (15 -3x)/4
answer is the first one.
1. y = (15 -3x)/4
Every 1 bag of jelly beans is 5 dollars.Hope it helps :)
4x - 2y = 7....multiply by 3
3x + 6y = 9
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12x - 6y = 21 (result of multiplying by 3)
3x + 6y = 9
-------------add
15x = 30
x = 30/15
x = 2
4x - 2y = 7
4(2) - 2y = 7
8 - 2y = 7
-2y = 7 - 8
-2y = -1
y = 1/2
solution (2,1/2)
