Question

Помогите хоть с чем нибудь!!

Answer 1

5/6-7/9=(5*3+7*2)/18=29/18=1 11/18
5 3/4 *12=23*12/4 =69
2.6 -1/5= (26-2)/10=2.4*8/3 =6.4

Answer 2

3*(5-2х)+7=3-4х

Answer 3

15-6х+7=3-4х

Answer 4

-6х+4х=-15-7+3 -2х=-18 х=9

Answer 5

1. а) 15/18-14/18=1/18
б) 23/4*12 (сократим 4 и 12) =69
2. 15-6х+7=3-4х
-6х+4х=15+7-3
-2х=19
х=9.5