Question

(23-5 inmultit cu x) : 9 =2
x=?
24:(5-x)=6  x=
32: (13-5 inmultit cu x  ) = 6 x=
3x-15:3=19 + 3 x=
5x-21:7=4+13   x=
13-14:x=18-7   x=

Answer 1

(23-5x)/9=2
23-5x=18
-5x=-5
x=1

24/(5-x)=6 
24=30-6x
-6=-6x
1=x

32/(13-5x) =6
32=78-30x
32-78=-30x
-46=-30x
1 întreg și 8/15= x 

3x-15/3=19+3
3x=22+15/3
3x= (66+15)/3
3x= 81/3
x=81/3:3
x=81/3*1/3
x=81/9
x=9

5x-21/7=4+13
5x=17+21/7
5x= (119+21)/7
5x=140/7
x= 140/7*1/5
x= 140/35
x= 4

13-14/x=18-7
-14/x=18-7-13
-14/x=-2
-14=-2x
7=x