Question

Решите уравнения:

а) 5х-4=7

б) 6х-3х+1=8

в) 8-3/5х=17

Answer 1

5х - 4 = 7
5х = 7 + 4 
х = 11 : 5
x = 2,2
---------------
6x - 3x + 1 = 8
3x = 8 - 1 
x = 7/3 
x = 2 1/3 
-----------------
8 - 3/5x = 17
3/5x = 8 - 17
x = - 9 : 3/5 
x = - 15

Answer 2

5х=11
×=11÷5=2,2

6×-3×=7
3×=7
×=7/3=2 1/3

8-3/5×=17
-3/5×=9
×=9÷-3/5
×=-15