Voi nota inmultirea cu •
iar ridicarea la putere cu ^
a)x+21•11=5^4-19•3
x+231=625-57
x+231=568
x=568-231=337
b)x-(7^2-44)=29•8-2^5
x-(49-44)=232-32
x-5=200
x=200+5=205
c)6x:15+7^2•5=15^2+17•3-27
2x:5+49•5=225+51-27
2x:5+245=249
2x:5=4
2x=5•4
2x=20
x=10
d)x-(29•5-12^2)=25^2-2•11•10
x-(145-144)=625-220
x-1=405
x=405+1=406
e)18:[(5^2-5x)•2-11]=2
18:[(25-5x)•2-11]=2
18:(50-10x-11)=2
18=2•(39-10x)
9=39-10x
10x=30
x=3
f)2014-{2015-[2014-(2013-x)]}=2012
2014-2015-2014-2013+x=2012
x-4028=2012
x=2012+4028=6040
