Question

Реши уровнения 18*20-х=90, 720:8+Х=470, 350:с=5*10, к:30=60*5

Answer 1

18*20-х=90
360-90=x
x=270
720:8+Х=470
90+x=470
x=470-90
x=380
350:с=5*10,
350:с=50
c=350:50
с=7
к:30=60*5
к:30=300
к=300*30
к=9000

Answer 2

18*20-x=90
X=18*20-90
X=270
720:80+x=470
X=470-720:80
X=461
350:c=5*10
350:c=50
50c=350
C= 7
K:30=60*5
K:30=300
K=9000