Question

Va rog ex 5,6,7 Va rooog

Answer 1

Răspuns:

5.

a) 3×x=81

x=81÷3

x=27

b)(-11)×y=121

y=121÷(-11)

y= -11

c)(-35)×z=-210

z=(-210)÷(-35)

z=6

6.

a)x÷(-8)=20

x=20×(-8)

x=-160

b)y:38=10

y=10×38

y=380

c)z÷(-19)=-18

z=-18×(-19)

z=342

7.

a)3x+72=0

3x=0-72

3x=-72

x=-72÷3

x=-24

b)-8y+800=0

-8y=0-800

-8y=-800

y=-800÷(-8)

y=100

c)22z+440=0

22z=0-440

22z=-440

z=-440÷22

z=-20