(3х+1012)*28-231=19
3х*28+1012*28-231-19=0
84х + 28336 - 250 =0
84х + 28086 = 0
84х = - 28086
х = -28086 : 84
х= -334 30/84 (или x = -334 целых 30/84)
х= - 334 целых 5*6/14*6
х= -334 5/14
Проверка:
(3 * (-334 5/14) + 1012) * 28 - 231 =
= (3/1 * (-4681/14) + 1012) * 28 - 231 =
= (3*(-4681)/1*14 + 1012) *28 - 231 =
= ((- 14043/14) + 1012) * 28 - 231 =
= 28 * ( -14043/14) + 28 * 1012 -231 =
= 28 * (-14043)/14 + 28336 - 231 =
= 2* (-14043) + 28105 = - 28086 + 28105 = 19
19=19
Овет х = -334 5/14 (или -334 целых 5/14
1)114/19=6
2)6*25=150
3)150-137=13
4)352/11=32
5)41-32=9
6)13*9=117
7)117/39=3
8)72-3=69
9)403/13=31
10)31+69=100