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Bianca1310B
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DAU 40 de Puncte!DAU COROANA!
Aflati numarul necunoscut!
a)935-a+72x12=1500
b)(320+a)x3x5=7500
c)170-(18+2xa):5=10
d)[(a:2+59):9+71]:20=5
e)[2+bx(40-4x5)+13]x10=550
f)[25x(9xb-11)-130]x10-325=125
g)[(bx14-784:14):(53-144:6)]x100=1000
h)(64:8+10x6+b):[72:4-(6x10-53)]=7
i)4000+[724+(750-25):25+15x5]:b-2025=2251