Ответ: 13-х; 10+у; 10+х; -16+х; 7-х; 2х-4; 4у; 3х+6; -4у+6; 2х.
Пошаговое объяснение:
1) (3-х)+10 = 3-х+10 = 3+10-х = 13-х;
2) -(2-у)+12 = -2+у+12 = -2+12+у = 10+у;
3) 14-(-х+4) = 14+х-4 = 14-4+х = 10+х;
4) -(8-х)-8 = -8+х-8 = -8-8+х = -16+х;
5) 4+(3-х) = 4+3-х = 7-х;
6) 2(х-4)+4 = 2х - 2*4 + 4 =2х - 8 + 4 = 2х - 4;
7) -2 (8- 2у) + 16 = -2*8 - 2*(-2у) + 16 = -16 + 4у + 16 = -16+16 + 4у =
= 4у;
8) 3(х-2)+12 = 3х - 3*2 + 12 = 3х - 6 + 12 = 3х + 6;
9) -4(у-4) - 10 = -4у - 4 *(-4) -10 = -4у +16 - 10 = -4у + 6;
10) -2(-х-4)-8 = -2*(-х) - 2*(-4) - 8 = 2х +8 - 8 = 2х.