Se bazeaza pe proprietatile puterilor
3^x.9-5.3^x=36
3^x=36:4=9=3^2
x=2
b) 2^51(1+2+4)=x.2^50
2.7.2^50=x.2^50
x=14
c)10^x.50+7.10^x=57000
10^x.57=57000
10^x=10^3
x=3
d)4^x.7=7.2^12
2^2x=2^12
2x=12,x=6
e)4^x(16+4+1)=336
4^x=16=4^2
x=2
f) 9^41(81-9-1)=71.3^x
3^82=3^x
x=82
g) 7^x(49-7-1)=41.7^2-x
x=2-x
2x=2,x=1
^-putere
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