Question

Rezolvati ecuatiile:a) 0,1⁴•0,3⁴•10²-x=3,008; b) 20,09•0,2²+x=2010; c) [(1,5²+x)•0,2]:0,1=10

Answer 1

a) 0,1⁴•0,3⁴•10²-x=3,008
0,0001*0,0081*100-x=3,008
0,0082*100-3,008=x
x=0,82-3,008
x= - 2,188
*=inmultire


b) 20,09•0,2²+x=2010
20,09*0,04+x=2010
0,8036+x=2010
x=2010-0,8036
x=2009,1964

c) [(1,5²+x)•0,2]:0,1=10
(1,5²+x)•0,2=10x0,1
(1,5²+x)•0,2=1
1,5²+x=1:0,2
2,25+x=5
x=5-2,25
x=2,75