Răspuns :

Crys157724id

36+6×9-(x:3+15)=42

36+54-(x:3+15)=42

90-(x:3+15)=42

(x:3+15)=90-42

(x:3+15)=48

x:3=48-15

x:3=33

x=33×3

x=99

36 + 6 × 9 - ( X : 3 + 15 ) = 42

36 + 54 - ( X : 3 + 15 ) = 42

90 - ( X : 3 + 15 ) = 42

X : 3 + 15 = 90 - 42

X : 3 + 15 = 48

X : 3 = 48 - 15

X : 3 = 33

X = 33 × 3

X = 99

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