Question

Aflati solutiile reale ale urmatoarelor ecuatii:
a) x-3/4 + x+5/3=3,5
b) x+7/2 - x+1/5=-2.4
c) 2x+3/3 - x+5/2=-4,5
d) x+5/6 - x-4/9=x+7/3
e) x+5/6 - x+3/4 = x-1/3
f) x+1/3 = x-2/2 + 5/6

Answer 1

2x=7/2+3/4-5/3
2x=(7*6+3*3-5*4)/12
2x=(42+9-20)/12
2x=31/12⇒x=31/6=5.1(6)

la b x-x=0 ?

x=-4.5-1-2.5
x=-8

-x=-5/6+4/9+7/3
-x =(-5*3+4*2+7*6)/18
-18x=-15+8+42
-18x=-35
x=35/18⇒1.9(4)

-x=-5/6-3/4-1/3
-x=(-5*2-3*3-1*4)12
-12x=-10-9-4
-12x=-23
x=23/12⇒1.91(6)

la f x-x=0  ?