Завдання:
Розв’яжи рівняння:
1) (x + 26) ⋅ 12 = 360;
2) 7(х – 15) = 1841;
3) (132 – x) : 4 = 23;
4) 910 : (х + 11) = 35;
5) 5(2x + 27) = 405;
6) (5х + 2х) : 2 = 252.
Розв'язок:
1) (x + 26) ⋅ 12 = 360
x + 26 = 360 : 12
x + 26 = 30
x = 30 - 26
x = 4
2) 7(х – 15) = 1841
x - 15 = 1841 : 7
x - 15 = 263
x = 263 + 15
x = 278
3) (132 – x) : 4 = 23
132 - x = 23 • 4
132 - x = 92
x = 132 - 92
x = 40
4) 910 : (х + 11) = 35
x + 11 = 910 : 35
x + 11 = 26
x = 26 - 11
x = 15
5) 5(2x + 27) = 405
2x + 27 = 405 : 5
2x + 27 = 81
2x = 81 - 27
2x = 54
x = 54 : 2
x = 27
6) (5х + 2х) : 2 = 252
7x = 252 • 2
7x = 504
x = 504 : 7
x = 72