Question

rezolvati in multimea N ecuatiile : 9x-1=0 3(1-2x)+8=32 60/(3y+20=12 1-3(8x-4)=1
1605+4(3-x0=2011 9*(5-3x)+71=89 (4x+5)/13+36=41 (3x+2)4-2=3 (3x-11)/2+12=2=

Answer 1

9x-1=0
9x=1
x=1/9

3(1-2x)+8=32
3-6x+8=32
11-6x=32
-6x=32-11
-6x=21
x=-21/6
x=-3 întregi 3/6
x=-3intregi 1/2

60/(3y+20)=12
60=12(3y+20)
12(3y+20)=60
36y+240=60
36y=60-240
36y=-180
y=-180:36
y=-5

1-3(8x-4)=1
-3(8x-4)=1-1
-3(8x-4)=0
-24x+12=0
-24x=-12
x=12:24
x=1/2

1605+4(3-x)=2011
1605+12-4x=2011
-4x=2011-1617
-4x=394
x=394:(-4)
x=-98,5

9(5-3x)+71=89
45-27x=89-71
-27x=18-45
-27x=-27
x=-27:(-27)
x=1

(4x+5)/13+36=41
(4x+5)/13=41-36
(4x+5)/13=5
4x+5=13•5
4x=65-5
4x=60
x=60:4
x=15

(3x+2)/4-2=3
(3x+2)/4=3+2
(3x+2)/4=5
3x+2=4•5
3x=20-2
3x=18
x=18:3
x=6

(3x-11)/2+12=2
(3x-11)/2=2-12
3x-11=-10•2
3x=-20+11
3x=-9
x=-9:3
x=-3