Помогите решить уравнение 1,2 +3/10y=8/15y+0,78

1,2+3/10y=8/15y+0,783/10у-8/15у=0,78-1,2-7/30у=-0,42у=-0,42:(-7/30)у=1,8

[latex]frac{12}{10}+frac{3}{10}y=frac{8}{15}y+frac{78}{100}\ frac{3}{10}y-frac{8}{15}y = frac{78}{100} - frac{12}{10}\ left(frac{3}{10}-frac{8}{15}ight)y = frac{78}{100} - frac{120}{100}\ left(frac{3cdot3}{30}-frac{8cdot2}{30}ight)y = frac{-42}{100}\ frac{7}{30}y = frac{42}{100}\ y = frac{42}{100}cdotfrac{30}7=frac{6cdot3}{10}=frac{18}{10}=1.8[/latex]