Question

3)rezolvati ecuatiile,scriind rezultatele sub forma de fractii zecimale:
g)x:1,1=1,1 la a 3
h)1,44=x la a 2
i)x la a 3=0,027

4)rezolvati ecuatiile si precizati daca solutiile apartin multimii numerelor naturale:
a)2x+2,4=6,2
b)5x-1,3=4,7
c)0,11x-0,01=0,1
d)0,9x-0,5=0,4
e)1,8x-0,6=3
f)6x+0,5=7

Answer 1

4)2x+2.4=6.2⇒2x=6.2-2.4⇒2x=3.8⇒x=3.8/2⇒x=1.9
5x-1.3=4.7⇒5x=4.7+1.3⇒5x=6⇒x=6/5⇒x=1.2
0.11x-0.01=0.1⇒0.11x=0.01+0.1⇒0.11x=0.11⇒x=0.11/0.11⇒x=1
0.9x-0.5=0.4⇒0.9x=0.5+0.4⇒0.9x=0.9⇒x=0.9/0.9⇒x=1
1.8x-0.6=3⇒1.8x=0.6+3⇒1.8x=3.6,x=3.6/1.8⇒x=2
6x+0.5=7⇒6x=7-0.5⇒6x=6.5⇒x=6.5/6⇒x=1.08(3)
sucees