Question

Розв'язати рівняння. !!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

$\frac{0.4x-2.5}{6} = \frac{4}{5} \\ \\ \frac{0.4x-2.5}{6} = \frac{4}{5} /*30 \\ \frac{30*(0.4x-2.5)}{6} = \frac{30*4}{5} \\ 5*(0.4x-2.5)=6*4 \\ 2x-12.5=24 \\ 2x=24+12.5 \\ 2x=36.5 \\ x=36.5/2 \\ x=18.25$

Answer 2

( 0,4X - 2,5) / 6 = 4/5 
0,4X - 2,5 = 4/5 * 6 
0,4X - 2,5 = 24/5 
0,4X = 24/5 + 2,5 
0,4X = 4,8 + 2,5 
0,4X = 7,3 
X = 7,3 : 0,4 
X = 18,25