Question

Ajutor repede varog dau coroana! Ex 3 și 4! Varog frumos!

Answer 1

produsul mezilor=produsul extremilor

a)5*x=2*3

x=(2*3)/5

x=6/5

b)4*5=1*x

x=20;

c)2*x=3*6

2*x=18

x=9

d)0,01*x=0,02*3

x=(0,02*3)/0,01

x=6

e)3*x=24

x=8

f)1*12=x*36

36*x=12

x=1/3

g)2*x=27*3

2*x=81

x=81/2

h)7*x=3*14

7*x=42

x=6

i)4*x=9*2

4*x=18

x=9/2

j)4*x=32*5

4*x=160

x=40

k)2*x*18=3*6

36*x=18

x=1/2

l)(x+1)*2=3*4

(x+1)*2=12

x+1=6

x=5

m)0,(2)*9=4*x

(2/9)*9=4*x

4*x=2

x=1/2

4)a)4*3=2*x

2*x=12

x=6

b)6*5=3*x

30=3*x

x=10

c)10*2=4*x

20=4*x

x=5

d)4*3=5*x

12=5*x

x=12/5

e)12*25=5*x

5*x=300

x=60

f)15*3=6*x

45=6*x

x=45/6=15/2