708,а) (х+3/4)(х+2/3)=(х-1/6)(х+7/16),
х²+2/3х+3/4х+1/2=х²+7/16х-1/6х-7/96,
(2/3+3/4-7/16+1/6)х=-1/2-7/96,
55/48х=-55/96,
х=-55/96 ·48/55,
х=-0,5.
708.б) (х-1/3)(х-1/6)=(х+5/6)(х+5 2/3),
х²-1/6х-1/3х+1/18=х²+5 2/3х+5/6х+85/18,
(-1/6-1/3-5 2/3-5/6)х=85/18-1/18,
-7х=42/9,
х=-2/3.