(7-10k) - (8-8k) + (10k+6) = -8
7-10k-8+8k+10k+6=-8
8k=-13
k=- 13/8
k= - 1 5/8
k = - 1.625
(-5 + 9 : (-9)) * 2 + 9 = (-5 + (-1))* 2 + 9 = -6 * 2 + 9 = -12 + 9 = - 3
-59 + (3 - 50 : 5) * 3 = -59 + ( 3 - 10) * 3 = - 59 + (-7) * 3 = -59 - 21 = -78
(-97 - 7 * (-5) - 28) : 9 = (-97 + 35 - 28) : 9 = -90 : 9 = - 10
РЕШЕНИЕ В ДОКУМЕНТЕ. НО Я МОГЛА И ОШИБИТЬСЯ!
2+8=10
3-2=1
9+1=10
10+10=20