Решите уравнение:
1) 21(18 + x) = 714;
2) 16(4x − 34) = 608;
3) 12(152 + 19x) = 2052;
4) (152x + 32) * 6 = 192.
21(18 + x) = 714
18 + x = 714 : 21
x = 34 − 18
x = 16
16(4x − 34) = 608
4x − 34 = 608 : 16
4x = 38 + 34
x = 72 : 4
x = 18
12(152 + 19x) = 2052
152 + 19x = 2052 : 12
19x = 171 − 152
x = 19 : 19
x = 1
(152x + 32) * 6 = 192
152x + 32 = 192 : 6
152x = 32 − 32
152x = 0
x = 0