Question

алгебра 8класс помогиттте​

Answer 1

а)

$x-\frac{x-y}{2} +\frac{x+y}{4} =\frac{4x}{4} -\frac{2(x-y)}{4} +\frac{x+y}{4} =\frac{4x-2x+2y+x+y}{4} =\frac{3x+3y}{4}$

б)

$\frac{5x}{8y} +\frac{x}{4y} =\frac{5x}{8y} +\frac{2x}{8y} =\frac{5x+2x}{8y} =\frac{10x}{8y} =\frac{5x}{4y}$

в)

$3a-\frac{a}{12} =\frac{36a}{12} -\frac{a}{12} =\frac{36a-a}{12}=\frac{35a}{12}$