👤

(2×a+2)×3÷4÷7=18
va rog repede dau coroana


Răspuns :

(2×a+2)×3÷4=18×7

(2×a+2)×3÷4=126

(2×a+2)×3=126×4

(2×a+2)×3=504

2×a+2=504÷3

2×a+2=168

2×a=168-2

2×a=166

a=166÷2

a=83