Question

и)2/5z+2/3z-1/5=2 1/2
к)3 1/2*(23х+4/7)=2 1/2
л)(5/8х-1/5)*3/4=3/4
м)3/5z+2/3z-3=4/5

Answer 1

и)2/5z+2/3z-1/5=2 1/2
  615z+1015z=2510+210
 1615z=2710
  z=2710*1516
  z=8132=2 1732
к)3 1/2*(23х+4/7)=2 1/2
  23х+47=52*27
23х=57-47
23х=17
х=17*32
х=314
л)(5/8х-1/5)*3/4=3/4
58х-15=34*43
58х=1+15
58х=55+15
58х=65
х=65*85
х=4825
м)3/5z+2/3z-3=4/5
915z+1015z=45+155
1915z=195
z=195*1519
z=3