3/x=5/7 8/3.5=4/y 5/6=1+t/10 1/z-1=6.5/8 2x-5/3=4/5 10/1.5=8/9-3x

21=5x x=4,2

14=8y y=7/4

6+6t=50 6t=44 t=22/3

8=6,5z-6,5 14,5=6,5z z=14,5/6,5

12=10x-25 37=10x x=3,7

12=90-30x 30x=78 x=39/15