Question

3x+5/5+9x-5/4=6+3x+1/2

Answer 1

3x+5)/5+(9x-5)/4=6+ (3x+1)/2

((3х+5)*4))/20+((9х-5)*5)/20=(6*20)/20+((3х+1)*10))/20

(12х+20++45х-25)20=(120+30х+10)/20

(57х-5)/20=(130+30х)/20

(57х-30х)/20=(5+135)/20

27х/20=135/20

х=135:27

х=5

 

Проверка:

(3*5+5)/5+(9*5-5)/4=6+(3*5+1)/2

20:5+40/4=6+16:2

4+10=6+8

14=14

Answer 2

3х+1+9х-1.25=6+3х+0.5
3х+9х+1-1.25=6+0.5+3х
12х-0.25=6.5+3х
12х-3х+6.5=0.25
9х=6.75
х=0.75

Answer 3

Спасибо за ответ