Question

1. Afla x ∈ R din: e) x+1 supra2 + x+2 supra 3 + x+3 supra 4=0 f) 1, 1(6)x -2 intregi 1 supra 2(x+2)=5x -9 g)1,5 - x-1 supra 4  =x supra 2 +5(1-2x) supra 4 h) 1-18 supra19 [0,5+0,(5)]+x=1-101

Answer 1

1. Aduci la același numitor
(6x+6+4x+8+3x+9)/12=0
13x+23=0
x=-23/13

2. 1.1(6)=105/90=7/4
7x/4-5(x+2)/2=5x-9
(7x-10x-20)/4=5x-9
-3x-20=20x-36
23x=16
x=16/23


3. 1.5-(x-1)/4=(2x+5-10x)/4
1.5=(5-8x+x-1)/4
6=4-7x
2=-7x
x=-7/2

4. 0.5+0.(5)=5/10+5/9=19/18
1-18/19•19/18+x=-100
1-1+x=-100
x=-100