Question

Află numărul necunoscut
25:5+a×2=25
b×4+40:5=16
24-c×3-15:3=10
d:4+35:5+4=21​

Answer 1

Răspuns:

Explicație pas cu pas:

25:5+a×2=25

5 + a x 2 = 25

a x 2 = 25 - 5

a x 2 = 20

a = 20 : 2

a = 10

25 : 5 + 10 x 2 = 5 + 20 = 25

b×4+40:5=16

b x 4 + 8 = 16

b x 4 = 16 - 8

b x 4 = 8

b = 8 : 4

b = 2

2 x 4 + 40 : 5 = 8 + 8 = 16

24-c×3-15:3=10

24 - c x 3 - 5 = 10

24 - c x 3 = 10 + 5

24 - c x3 = 15

c x 3 = 24 - 15

c x 3 = 9

x = 9 : 3

x = 3

24 - 3 x 3 - 15 : 3 = 24 - 9 - 5 = 10

d:4+35:5+4=21​

d : 4 + 7 + 4 = 21

d : 4 = 21 - 7 - 4

d : 4 = 10

d = 10 x 4

d = 40

40 : 4 + 35 : 5 + 4 = 10 + 7 + 4 = 21