12 1/3 - 7 3/4 = 37/3 -31/4 = 148/12 - 93/12 = 55/12 = 4 7/12
55/12 * 6/11 = 5/2 =2 1/2 = 2,5
19x -14x=115
5х=115
х=115:5
х=23
(3x+1)*2=26
3х+1=26:2
3х+1=13
3х=13-1
3х=12
х=12:3
х=4
<span>Решите: </span>
<span>(1456-985):3+83*12=471:3+996=157+996=1153</span>
7х + 51 = 100
7х = 100 - 51
7х = 49
х = 49 : 7
х = 7
Проверка
7 * 7 + 51 = 100
49 + 51 = 100
100 = 100 верно
41-36:х = 29
36:х = 41 - 29
36:х=12
х = 36:12
х = 3
Проверка
41 - 36:3 = 29
41 - 12 = 29
29 = 29 верно
17х=4,25
х=4,25/17
х=0,25
ответ 0,25