Вариант 2 1) 7x/18p - 4x/18p 2) a+15b/27a - a-12b/27a 3) t/t^2-16 - 4/t^2-16 4) 4x/x-y + 4y/y-x 5) 5+8y/4-y^2 - 7y+3/4-y^2 6) 6x/x^2-16 + 24/x^2-16

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Вариант 2 1) 7x/18p - 4x/18p 2) a+15b/27a - a-12b/27a 3) t/t^2-16 - 4/t^2-16 4) 4x/x-y + 4y/y-x 5) 5+8y/4-y^2 - 7y+3/4-y^2 6) 6x/x^2-16 + 24/x^2-16

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1) $\frac{7x}{18p} - \frac{4x}{18p} = \frac{7x - 4x}{18p} = \frac{3x}{18p} = \frac{x}{6p}$ 2) $\frac{a + 15b}{27a} - \frac{a - 12b}{27a} = \frac{a + 15b - (a - 12b)}{27a} = \frac{a + 15b - a + 12b}{27a} = \frac{27b}{27a} = \frac{b}{a}$ 3) $\frac{t}{t^2 - 16} - \frac{4}{t^2 - 16} = \frac{t - 4}{t^2 - 16} = \frac{t - 4}{(t - 4)(t + 4)} = \frac{1}{t + 4}$ 4) $\frac{4x}{x - y} + \frac{4y}{y - x} = \frac{4x}{x - y} - \frac{4y}{x - y} = \frac{4x - 4y}{x - y} = \frac{4(x - y)}{x - y} = 4$ 5) $\frac{5 + 8y}{4 - y^2} - \frac{7y + 3}{4 - y^2} = \frac{5 + 8y - (7y + 3)}{4 - y^2} = \frac{5 + 8y - 7y - 3}{4 - y^2} = \frac{y + 2}{4 - y^2} = \frac{y + 2}{(2 - y)(2 + y)} = \frac{1}{2 - y}$ 6) $\frac{6x}{x^2 - 16} + \frac{24}{x^2 - 16} = \frac{6x + 24}{x^2 - 16} = \frac{6(x + 4)}{(x - 4)(x + 4)} = \frac{6}{x - 4}$

Вариант 2 1) 7x/18p - 4x/18p 2) a+15b/27a - a-12b/27a 3) t/t^2-16 - 4/t^2-16 4) 4x/x-y + 4y/y-x 5) 5+8y/4-y^2 - 7y+3/4-y^2 6) 6x/x^2-16 + 24/x^2-16

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