Răspuns :
(142-63 :7)+a=150
( 142 - 9) + a = 150
133 + a = 150
a = 150 - 133
a = 17
a : 7+120 +307 =501
a : 7 = 501 - 327
a : 7 = 174
a = 174 x 7
a =1218
a < =27 : 9+ (505 - 497)
a < = 3 + 8
a < = 11
a = { 0,1,2,3,4,5,6,7,8,9,10,11}
( 142 - 9) + a = 150
133 + a = 150
a = 150 - 133
a = 17
a : 7+120 +307 =501
a : 7 = 501 - 327
a : 7 = 174
a = 174 x 7
a =1218
a < =27 : 9+ (505 - 497)
a < = 3 + 8
a < = 11
a = { 0,1,2,3,4,5,6,7,8,9,10,11}