Question

{2+2.4+1.5x+x}/4=6.7

Answer 1

(2+2.4+1.5x+x)/4=6.7

4,4+2,5х=6,7*4

4,4+2,5х=26,8

2,5х=26,8-4,4

2,5х= 22,4

х=22,4:2,5

х= 8,96

Answer 2

{2+2.4+1.5x+x}/4=6.7

4.4+2.5x=6.7*4

4.4+2.5х=26,8

2,5х=26,8-4.4

2,5х=22,4

х=22,4:2,5

х=8,96

Проверка:

(2+2,4+1,5*8.96+8,96):4=6,7

6,7=6,7