Răspuns :
(x:2+160):4=160 |·4
x:2+160=160·4
x:2+160=640 |-160
x:2=640-160
x:2=480 |·2
x=480·2
x=960
x:2+160=160·4
x:2+160=640 |-160
x:2=640-160
x:2=480 |·2
x=480·2
x=960
(x:2+160):4=160 probă: (x:2+160):4=160
(x:2+160) =160·4 (960:2+160):4=160
(x:2+160) =640 (480+160):4=160
x:2 =640-160 640:4=160
x:2 =480 160= 160
x = 480·2
x = 960
(x:2+160) =160·4 (960:2+160):4=160
(x:2+160) =640 (480+160):4=160
x:2 =640-160 640:4=160
x:2 =480 160= 160
x = 480·2
x = 960