a)
3^{98}(3²-3-1)/x=(3³)^{32}/0,(3)
Pe 0,(3) ]l scriem ca 3/9=1/3
3^{98}(5)/x=(3)^{96}/(1/3)
Simplificam cu 3 la puterea 96
(3²)*5/x=1/(1/3), (3²)*5/x=3, 3*5/x=1, x=3*5, x=15.
b) x*2^{3*16}=(2/9)*2^{49}*(2²-2-1),
x*2^{48}=(2/9)*2^{49}*(1), simplificam cu 2^{48}
x=(2/9)*2, x=4/9
