Carol H. answered • 11/15/17

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Masters' Degree in Mathematics with 35 Years of Teaching Experience

**Let x = the cost of one muffin**

**Let y = the cost of one quart of milk**

**3x + y = 7.50 y = 7.50 - 3x**

**8x + 2y = 18**

**8x + 2(7.50 - 3x) = 18**

**8x + 15 - 6x = 18**

**2x = 3**

**x = $1.50**

**y = 7.50 - 3(1.50) = 7.50 - 4.50**

**y = $3.00**