Question

a-14)+6)+9=21
(a+15):6)x5=25
(a:10)+32):7=5
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Ajutor! Dau coroana!​

Answer 1

Răspuns:

Explicație pas cu pas:

[(a - 14 ) + 6] + 9 = 21

( a - 14 ) + 6 = 21 - 9

a - 14 = 12 - 6

a - 14 = 6

a = 6 + 14

a = 20

Verific:  ( 20 - 14 + 6 )+ 9  = 12 + 9 = 21

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[( a+ 15) : 6] × 5 = 25

( a+ 15) : 6 = 25 : 5

( a+ 15) : 6 = 5

a + 15 = 5 × 6

a + 15 = 30

a = 30 - 15

a = 15

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[( a : 10 ) + 32 ] : 7 = 5

( a : 10 ) + 32 = 5 × 7

( a : 10) + 32 = 35

a : 10 = 35 - 32

a : 10 = 3

a = 3 × 10

a = 30