1) x/5+4=9
х+20=45
x=45-20=25
2)1/x + 2 = 5
5x – 2х = 1
3x = 1
х = 1/3
<span>62, 3 + (50,1-3,3*(96,96:9,6))*1,8=62,3+(50,1-33,33)*1,8=62,3+30,19=92,5</span>