Question

уравнение :
4х-3,9= -7х+5

Answer 1

4x - 3,9 = -7x + 5
4x + 7x = 3,9 + 5
11x = 8,9
x = 8,9 : 11
x = 0,8090909091

Answer 2

4x+7x=3,9+5
11x=8,9
x=8,9:11
x=0,8090909090909091