Помогите 730-740 побыстрее плиз

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