A) (4x + 7x) 5 = 55011x 5 = 55055x = 550x = 550 / 55x = 10
Проверка:(410 + 710) 5 = 110 5(40 + 70) 5 = 550110 5 = 550550 = 550
Ответ: x = 10
Б) 4(2x + 6) - 18 = 228x + 24 - 18 = 228x + 6 = 228x = 22 - 68x = 16x = 16 / 8x = 2
Проверка:4(2*2 + 6) - 18 = 224(4 + 6) - 18 = 224(10) - 18 = 2240 - 18 = 2222 = 22
Ответ: x = 2
В) (x + 6) / 15 = 12x + 6 = 12 * 15x + 6 = 180x = 180 - 6x = 174
Проверка:(174 + 6) / 15 = 12180 / 15 = 1212 = 12
Ответ: x = 174
Г) 164 / (2x + 1) = 4164 = 4(2x + 1)164 = 8x + 48x = 164 - 48x = 160x = 160 / 8x = 20
Проверка:164 / (2*20 + 1) = 4164 / (40 + 1) = 4164 / 41 = 44 = 4
Ответ: x = 20
A) (4x + 7x) 5 = 550
11x 5 = 550
55x = 550
x = 550 / 55
x = 10
Проверка:
(410 + 710) 5 = 110 5
(40 + 70) 5 = 550
110 5 = 550
550 = 550
Ответ: x = 10
Б) 4(2x + 6) - 18 = 22
8x + 24 - 18 = 22
8x + 6 = 22
8x = 22 - 6
8x = 16
x = 16 / 8
x = 2
Проверка:
4(2*2 + 6) - 18 = 22
4(4 + 6) - 18 = 22
4(10) - 18 = 22
40 - 18 = 22
22 = 22
Ответ: x = 2
В) (x + 6) / 15 = 12
x + 6 = 12 * 15
x + 6 = 180
x = 180 - 6
x = 174
Проверка:
(174 + 6) / 15 = 12
180 / 15 = 12
12 = 12
Ответ: x = 174
Г) 164 / (2x + 1) = 4
164 = 4(2x + 1)
164 = 8x + 4
8x = 164 - 4
8x = 160
x = 160 / 8
x = 20
Проверка:
164 / (2*20 + 1) = 4
164 / (40 + 1) = 4
164 / 41 = 4
4 = 4
Ответ: x = 20