Answer:
7.5/5 = 1.5
6/1.5 = 4
X = 4
I'm pretty sure it's right
4a + 6b = 10
2a - 4b = 12...multiply by -2
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4a + 6b = 10
-4a + 8b = - 24 (result of multiplying by -2)
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14b = - 14
b = -14/14
b = -1
2a - 4b = 12
2a - 4(-1) = 12
2a + 4 = 12
2a = 12 - 4
2a = 8
a = 8/2
a = 4
so 12a = 12(4) = 48 <==
The answer is a. $35. First you multiply 25 by .40. Then you add the product to 25.
60, I think this is the right answer !