3/14=21/2(х+31)
9/10=63/5(х+8)
3/14=21/(2х+62)
6х+186=294
6х=108
х=18
9/10=63/(5х+40)
45х+360=630
45х=270
х=6
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3/14=21/2(х+31)
3/14=21/(2х+62)
6х+186=294
6х=108
х=18
9/10=63/5(х+8)
9/10=63/(5х+40)
45х+360=630
45х=270
х=6