Помогите решить (x+38)-59=125 3*(x+15)=186 2x+3x+16=51 x:4+5=16

1)( x + 38 ) - 59 = 125
x + 38 = 125 + 59
x + 38 = 184
х = 184 - 38
х = 146
проверка:
( 146 + 38 ) - 59 = 125
184 - 59 = 125
125 = 125

2) 3 * ( x + 15 ) = 186
3х + 45 = 186
3х = 186 - 45
3х = 141
х = 141 : 3
х = 47
проверка:
3 * ( 47 + 15 ) = 186
141 +45 = 186
186 = 186

3)2x + 3x + 16 = 51
5х = 51 - 16
5х = 35
х = 7
проверка:
2 * 7 + 3 * 7 + 16 = 51
14 + 21 + 16 = 51
51 = 51

4) x : 4 + 5 = 16
х : 4 = 16 -5
х : 4 = 11
х = 11 * 4
х = 44
проверка:
44 : 4 +5 = 16
11 +5 = 16
16 = 16