ГДЗ Математика 8 клас Істер (2025) - 1 ЧАСТИНА

Подайте у вигляді дробу:

1) a/4 + (a-2)/3 = (3a+4(a-2))/12 = (3a+4a-8)/12 = (7a-8)/12;
2) (2x-y)/14 – (x-y)/7 = (2x-y-2(x-y))/14 = (2x-y-2x+2y)/14 = y/14;
3) (x-6)/2x + (7-2y)/4y = (2y(x-6)+ x(7-2y))/4xy = (2xy-12y+7x-2xy)/4xy = (7x-12y)/4xy;
4) (6m-n)/3m – (8n-5m)/4n = (4n(6m-n)- 3m(8n-5m))/12mn = (24mn-4n^2- 24mn+15m^2)/12mn = (15m^2- 4n^2)/12mn.