Question

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Answer 1

b) 3x = 8+13

x = 21/3 = 7

c) X=14/2 = 7

d) 2x +5x = 12 + 2

7x = 14

x= 14/7 = 2

e) x= -21/7 = -3

f) x = -79 + 39

x = -40

g) 7x = -12 + 33

7x = 21

x = 21/7 =3

h) 9x -4x= 18 + 2

5x = 20

x=20/5

x= 4

i) 2x+10 -4 = 26

2x = 26 -6

2x= 20

x = 20/2 =10

j) x = 18/2 =9

k) x = v625 = 25

2)

a) 2x + 5 = 91

2x = 86

x= 43

b) 3y -4 = 23

3y = 27

y = 9

3) X.1,25 = 13,75

x = 13,75/1.25

x = 11

b) 3.x = 60 pacotes

x=20 reais