Question

Encontre o valor de ×



A ) ×-7=10
B) 2×+5=15
C)3×-4=8
D)10×=100
E)11×+1=12
F)12×+3=39
G)13×-3=36
H)5×+7=42
I)7×+8=64
Me ajude pfvr é pra amanhã com conta pfvr

Answer 1

a)

x -7 = 10

x = 10 +7

x = 17

b)

2x +5 = 15

2x = 15 -5

2x = 10

x = 10 ÷ 2

x = 5

c)

3x -4 = 8

3x = 8+4

3x = 12

x = 12 ÷ 3

x = 4

d)

10x = 100

x = 100 ÷ 10

x = 10

e)

11x +1 = 12

11x = 12 -1

11x = 11

x = 1

f)

12x +3 = 39

12x = 39 -3

12x = 36

x = 36 ÷ 12

x = 3

g)

13x -3 = 36

13x = 36 + 3

13x = 39

x = 39 ÷ 13

x = 3

h)

5x +7 = 42

5x = 42 -7

5x = 35

x = 35 ÷ 5

x = 7

i)

7x +8 = 64

7x = 64 -8

7x = 56

x = 56 ÷ 7

x = 8