Question

9) calcule o valor se X nas igualdades

a: X + 9 =11
b: 15 + X =25

c: X - 12 =8

d: X. 2 =50

e: 3. X =15

f:10. X =30

g: 16. X =8

h: X : 6 =2

i: 20 : X =4

j: 16 : X =8

k: X : 10 =4

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Answer 1

a: X + 9 =11

X = 11 - 9

X = +2

b: 15 + X =25

X = 25 - 15

X = +10

c: X - 12 =8

X = 8 + 12

X = +20

d: X. 2 =50

X = 50 / 2

X = +25

e: 3. X =15

X = 15 / 3

X = +5

f:10. X =30

X = 30 / 10

X = +3

g: 16. X =8

X = 8 / 16

X = + 1/2

h: X : 6 =2

X = 2 . 6

X =+12

i: 20 : X =4

X = 4 . 20

X = +80

k: X : 10 =4

X = 4 . 10

X = +40