Решите уравнения:(4,2x + 3,1) - (0,7x - 2,7) = 6,85 - (2,5x - 2,5) - (3,1x - 3,1) = -...

Question

Решите уравнения:(4,2x + 3,1) - (0,7x - 2,7) = 6,85
- (2,5x - 2,5) - (3,1x - 3,1) = - (1,6 - 1,6x)
(3,1x + 3,1) - (1,8x + 1,8) =1,6x + 1,6

Answer 1

3.5х+5.8=6.85, 3.5х=6.85-5.8, х=1.05/3.5, х=0.3.