(1)20.52x-(1-0.52)x=80
20.52x-0.48x=80
20.04x=80
x=2000/501
(2)43x+7=32-2x
43x+2x=32-7
45x=25
x=5/9
(3)2(7x-5)=3
7x-5=1.5
7x=6.5
x=13/14
(1)20.52x-(1-0.52)x=80
20.52x-0.48x=80
20.04x=80
x=2000/501
(2)43x+7=32-2x
43x+2x=32-7
45x=25
x=5/9
(3)2(7x-5)=3
7x-5=1.5
7x=6.5
x=13/14