Ответ:
1) 2 (x+3) = 2x+6
2) 59x-x+52 = 2(29x+26) | 58x+52
3) M(3-4n+3p)= 3M-4MN+3Mp
4) (3x+4y+b)*15= 45x+60y+15b
6/4 • 12 / 36 = 3/2 * 1/3 = 1/2