Question

[tex]1 \frac{1}{9}x +0,5 = x + 6,7
Ma puteti invata cum se face si de ce ?

Answer 1

$\frac{9+1}{9}x+ \frac{1}{2} = x + \frac{67}{10}$
$\frac{10*2}{9*2}x+ \frac{9}{2*9} = \frac{67+10x}{10}$
$\frac{20*x+9}{18} = \frac{67+10x}{10}$
$\frac{5*20*x+5*9}{90} = \frac{9*67+9*10x}{90}$
100x+45=603+90x
100x-90x=603-45
10x=558
$x=\frac{558}{10}$
x=55.8