Question

$5n + 9n + 32 = 200$
$(x + 57) \div 7 = 12$
$(161 - y) \div 16 = 9$
$112 \div (17 + x) = 4$

Answer 1

1)

14n+32=200

14n=200-32

14n=168

n=168:14

n=12

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2)

x+57=12*7

x+57=84

x=84-57

x=27

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3)

161-y=9*16

161-y=144

y=161-144

y=17

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4)

17+x=112:4

17+x=28

x=28-17

x=11

Answer 2

1. 5n + 9n + 32 = 200
14n + 32 = 200
14n = 200 - 32
14n = 168
n = 168 ÷ 14
n = 12.
Ответ : n = 12.

2. ( х + 57 ) ÷ 7 = 12
х + 57 = 12 × 7
х + 57 = 84
х = 84 - 57
х = 27.
Ответ : х = 27.

3. ( 161 - у ) ÷ 16 = 9
161 - у = 9 × 16
161 - у = 144
у = 161 - 144
у = 17.
Ответ : у = 17.

4. 112 ÷ ( 17 + х ) = 4
17 + х = 112 ÷ 4
17 + х = 28
х = 28 - 17
х = 11.
Ответ : х = 11.

Удачи))))