ГДЗ Математика 8 клас Істер (2025) - 1 ЧАСТИНА

Спростіть вираз:

1) 5x/2a + 3x/2a = 8x/2a = 4x/a;
2) (a+b)/12 – (a-5b)/12 = (a+b-(a-5b))/12 = (a+b-a+5b)/12 = 6b/12 = b/2;
3) (b-3)/5 + (13-b)/5 = (b-3+13-b)/5 = 10/5 = 2;
4) (a+2b)/8 + (3a+6b)/8 = (a+2b+3a+6b)/8 = (4a+8b)/8 = (4(a+2b))/8 = (a+2b)/2;
5) (6m-3)/10m – (m-13)/10m = (6m-3-(m-13))/10m = (6m-3-m+13)/10m = (5m+10)/10m = (5(m+2))/10m = (m+2)/2m;
6) (5x-3)/4x + (11-x)/4x = (5x-3+11-x)/4x = (4x+8)/4x = (4(x+2))/4x = (x+2)/x.