Question

Решите уравнение 2 - (0,9x - 1,3) = 1,3x

Answer 1

2-(0,9x-1,3)=1,3x

2-0,9x+1,3=1,3x

3,3-0,9x=1,3x

3,3=2,2x

x=3,3/2,2

x=1,5

Answer 2

2-1.3=1.3х+0.9х
2.2х=3.3 
х=1.5