Question

Помогите
реши пример
3/4 * х + 7/6 = 29/9
4/7 * х - 13/5 = 7/5
29/9 - 7/8 * х = 17/6
5/7 : х + 13/5 = 13/4

Answer 1

Ответ:

3/4*х+7/6=29/9 |*36

27х+42=116

27х=116-42

27х=74 |÷27

х=74/27=2_20/27

4/7*х-13/5=7/5 |*35

20х-91=49

20х=49+91

20х=140 |÷20

х=7

29/9-7/8*х=17/6 |*72

232-63х=204

-63х=204-232

-63х= -28 |÷(-63)

х = 4/9

5/7÷х+13/5=13/4

5/7*1/х+13/5=13/4

5/(7х)+13/5=13/4

5/(7х)=13/4-13/5

5/(7х)=13/20

100=91х

91х=100 |÷91

х=100/91=1_9/91