2. 外语
  3. Solve each of the following systems of equations for x and y. (a) x+y = 24 x-y=l8 (b) 3x-y = -5 x + 2y = 3 (c) 15x- 18 - 2y =-3

Solve each of the following systems of equations for x and y. (a) x+y = 24 x-y=l8 (b) 3x-y = -5 x + 2y = 3 (c) 15x- 18 - 2y =-3

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问题 Solve each of the following systems of equations for x and y.
(a) x+y = 24
x-y=l8
(b) 3x-y = -5
x + 2y = 3
(c) 15x- 18 - 2y =-3x+y
10x + 7y + 20 = 4x + 2
选项
答案x = -1 y = 2
解析
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