730. (5*2 +x)/2 =(3x +6)/5
(10 +x)*5 =(3x +6)*2
50 +5x =6x +12
5x -6x =12 -50
-x = -38
x =38
731. 8 +x =(x +2)/7
(8 +x)*7 =x +2
56 +7x -x =2
6x =2 -56
6x = -54
x = -9
732. (9+x)*4 =x +3
36 +4x -x =3
3x =3 -36
3x = -33
x = -11
733. (2*5 +x)/5 =(x +1)/2
(10 +x)*2 =(x +1)*5
20 +2x =5x +5
2x -5x =5 -20
-3x = -15
x =5
734. (7*4 +x)/4 =x +4
28 +x =(x +4)*4
28 +x =4x +16
x -4x =16 -28
-3x = -12
x =4
735. (8*4 +x)/4 =x +5
32 +x =(x +5)*4
32 +x =4x +20
-3x = -12
x =4
736. (5x +1 +5*7)/7 =x
5x +1 +35 =7x
5x -7x +36 =0
-2x = -36
x =18
737. (x+8+5)*2 =7x
2x +16 +10 -7x =0
-5x = -26
x =5.2
738. (4x+6+9*2)/2 =2x/3
(4x+24)*3 =2x*2
12x +72 -4x =0
8x = -72
x = -9
739. (2x+5+4*6)/6 =4x/7
(2x +29)*7 =4x*6
14x +203 -24x =0
-10x = -203
x =20.3
740. (4x+4)/8 +5 =9x/7
(4x+4+5*8)/8 =9x/7
(4x +44)*7 =9x*8
28x +308 -72x =0
-44x = -308
x =7