Question

(8.5+1.2х+х)*4=86.8
Уровнение

Answer 1

(8.5+1.2х+х)*4=86.8

(8.5 + 2.2х) * 4 = 86.8

8,5 + 2,2x = 86,8 : 4

8,5 + 2,2x = 21,7

2,2x = 21,7 - 8,5

2,2x = 13,2

x = 13,2 : 2,2

x = 6

Answer 2

(8,5+1,2х+х)*4=86,8;
34+4,8х+4х=86,8;
4,8х+4х=86,8-34;
8,8х=52,8;
х=52,8:8,8;
х=6;
Ответ: 6.