Question

решите систему уравнений 3x+y=5 , x+2/5 + 5-3x/2=-1

Answer 1

X + 275 - 3X2 = - 1

10X + 54 - 15X = - 10

- 5X = - 10 - 54

- 5X = - 64

X = 12.8

.............................

3*12,8 - 5 = Y

38.4 - 5 = Y

Y = 33.4

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ответ: X = 12.8  Y = 33.4