1)- в=0,5 2)7х=3,5 3)2у-=1 4)+х= 5)- а=а+2
(5/6)b=0.5=1/2 b=1/2:5/6=6/10=3/5 7x=3.5 x=3.5/7=0.5 2y-5/8=1 2y=1+5/8=13/8 y=(13/8):2=13/16 3/4+(2/3)x=1/2 (2/3)x=1/2-3/4=2/4-3/4=-1/4 x=(-1/4):2/3=-3/8 (5/6)a=(2/3)a+2 (5/6)a-(2/3)a=2 (5/6)a-(4/6)a=2 (1/6)a=2 a=2:(1/6)=12