If x² - y² = 44, and x - y = 12, then y =

Question

If x² - y² = 44, and x - y = 12, then y =

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Помогите(((

Answer 1

X-y = 12 => y = x-12
x^2 - y^2 = 44
x^2 - (x-12)^2 = 44
x^2 - (x^2 - 24x + 144) = 44
24x - 144 = 44
24x = 188
x = 188/24 = 94/12 = 47/6 
y = x - 12 = 47/6 - 12 = 47/6 - 72/6 = - 25/6
ответ: 25/6 (двадцать пять шестых)