Завдання:
Розв’яжи рівняння:
1) 9 ⋅ 12x = 648;
2) 7 ⋅ 2x ⋅ 13 = 910;
3) (3 ⋅ 2x) : 7 = 42;
4) 70 000 : (25 ⋅ 8x ⋅ 7) = 50.
Розв'язок:
1) 9 ⋅ 12x = 648
108x = 648
x = 648 : 108
x = 6
2) 7 ⋅ 2x ⋅ 13 = 910
182x = 910
x = 910 : 182
x = 5
3) (3 ⋅ 2x) : 7 = 42
6x = 42 ⋅ 7
6x = 294
x = 294 : 6
x = 49
4) 70 000 : (25 ⋅ 8x ⋅ 7) = 50
1400x = 70 000 : 50
1400x = 1400
x = 1400 : 1400
x = 1