Question

8. Află numărul necunoscut:
o
25:5 + ax 2 = 25
b x 4 + 40:5 = 16
24-CX3 - 15:3 = 10
d: 4 + 35:5 + 4 = 21​

Answer 1

Răspuns:

Salutare!:)

25:5+a×2=25

5+a×2=25

a×2=25-5

a×2=20

a=20:2

a=10

v:25:5+10×2=5+20=25

b×4+40:5=16

b×4+8=16

b×4=16-8

b×4=8

b=8:4

b=2

v:2×4+40:5=8+8=16

24-c×3-15:3=10

24-c×3-5=10

24-c×3=10+5

24-c×3=15

c×3=24-15

c×3=9

c=9:3

c=3

v:24-3×3-15:3=24-9-5=15-5=10

d:4+35:5+4=21

d:4+7+4=21

d:4+7=21-4

d:4+7=17

d:4=17-7

d:4=10

d=10×4

d=40

v:40:4+35:5+4=10+7+4=17+4=21

Succes!