Question

Y:12+15=21
2320-x:4=1990
1960-200:x=1910

Answer 1

Решения:

$1. \ y div 12 + 15 = 21 \ frac{y}{12} = frac{6}{1} \ y = 72 \ \ 2. \ 2320 - 4 div x = 1990 \ - frac{4}{x} = - frac{330}{1} \ 330x = 4 \ x = frac{2}{165} \ \ 3. \ 1960-200 div x=1910 \ - frac{200}{x} = - frac{50}{1} \ 50x = 200 \ x = 4$

Answer 2

Решение:

y : 12 + 15 = 21

y = (21 - 15)*12

y = 72

Ответ:72

2320 - x : 4 = 1990

2320 - 1990 = x : 4

x = 330*4

x = 1320

Ответ:1320

1960 - 200 : x = 1910

1960 - 1910 = 200 : x

x = 200 : 50

x = 4

Ответ:4