Question

Решить уравнение

1) 25(х+13)=625

2) 3(х-17)=81

3) 2(х-15)=164

4)196:(х-13)=14

Answer 1

Ответ:

1) 12

2) 10

3) 67

4) помог чем смог

Answer 2

Ответ:

1)

$x = 12$

2)

$x = 44$

3)

$x = 97$

4)

$x = 27$

Пошаговое объяснение:

1)

$25(x + 13) = 625$

$x + 13 = 625 \div 25$

$x + 13 = 25$

$x = 25 - 13$

$x = 12$

Проверка:

$25(12 + 13) = 625$

$25 \times 25 = 625$

$625 = 625$

$625 - 625 = 0$

$0 = 0$

2)

$3(x - 17) = 81$

$x - 17 = 81 \div 3$

$x - 17 =2 7$

$x = 27 + 17$

$x = 44$

Проверка:

$3(44 - 17) = 81$

$3 \times 27 = 81$

$81 = 81$

$81 - 81 = 0$

$0 = 0$

3)

$2(x - 15) = 164$

$x - 15 = 164 \div 2$

$x - 15 = 82$

$x = 82 + 15$

$x = 97$

Проверка:

$2(97 - 15) = 164$

$2 \times 82 = 164$

$164 = 164$

$164 - 164 = 0$

$0 = 0$

4)

$196 \div (x - 13) = 14$

$196 = 14(x - 13)$

$14(x - 13) = 196$

$x - 13 = 196 \div 14$

$x - 13 = 14$

$x = 14 + 13$

$x = 27$

Проверка:

$196 \div (27 - 13) = 14$

$196 \div 14 = 14$

$14 = 14$

$14 - 14 = 0$

$0 = 0$