c) x +2/9+ x-1/3=1 f) x/2=2/5 ( 4-x ) -4

c) x +2/9+ x-1/3=1 2x=1+1/3-2/9 2x=1+3/9-2/9 2x=1+1/9 2x=10/9 x=5/9 f) x/2=2/5 ( 4-x ) -4 x/2=8/5-2/5x-4 /*2 x=16/5-4/5x-8 x=12/5x-8 x-12/5x=-8 -7/5x=-8 /*(-1) 7/5x=8 /*5 7x=40 /:7 x=40/7 x=5+5/40 x=5+1/8