8/9×(-2.7b+2,5)-2/3×(1/3-1.2b)=-2 помогите решить
8/9×(-2,7b)=8/9×(-2 7/10b)=8/9×(-27/10b)= -12/5b 8/9×2,5=8/9×2 1/2=8/9×5/4=10/9 -12/5b+10/9 --------- -2/3×1/3= -2/9 -2/3×(-1,2b)=2/3×1 1/5b=2/3×6/5b=4/5b -2/9+4/5b ---------- -12/5b+10/9-2/9+4/5b= -2 -8/5b= -2-8/9 b= -26/9×(-5/8) b=65/36 b= 1 29/36