Question

me ajudem...preciso para amanha quem puder me ajudar

Answer 1

Resposta:

ATIVIDADE 1

a) X + 5 = 8

X = 8 - 5

X = 3

b) X - 4 = 3

X = 3 + 4

X = 7

c) X + 6 = 5

X = 5 - 6

X = -1

d) X - 7 = -7

X = -7 +7

X = 0

e) X + 9 = -1

X = -1 -9

X = -10

f) X - 39 = -79

X = -79 +39

X = -40

g) 10 = X +8

-X = 8 -10

-X = -2 . (-1)

X = 2

h) 15 = X + 20

-X = 20 -15

-X = 5 . (-1)

X = -5

i) 4 = X - 10

-X = -10 - 4

-X = -14 . (-1)

X = 14

j) 7 = X +8

-X = 8 -7

-X = 1 . (-1)

X = -1

k) X -1 = 5

X = 5 +1

X = 6

l) 2X + 4 = 16

2X = 16 +4

2X = 20

X = 20/2

X = 10

m) 3X = 15

X = 15/3

X = 5

n) 2X = 10

X = 10/2

X = 5

o) 3X = -9

X = -9/3

X = -3

p) 2X - 2 = 12 -5X

2X + 5X = 12 + 2

7X = 14

X = 14/7

X = 2

q) 3X - 13 = 8

3X = 8 + 13

3X = 21

X = 21/3

X = 7

r) 4X - 9 = 23

4X = 23 + 9

4X = 32

X = 32/4

X = 8

s) 7X - 33 = -12

7X = -12 +33

7X = 21

X = 21/7

X = 3

t) 33 +X = 5 -3X

X +3X = 5 -33

4X = -28

X = -28/4

X = -7

u) 2X = 14

X = 14/2

X = 7

v) 7X = -21

X = -21/7

X = -3

w) 4X = -12

X = -12/4

X = -3

x) 35X = -105

X = -105/35

X = -3

ATIVIDADE 2

a) 9X -2 = 4X +18

9X -4X = 18 +2

5X = 20

X = 20/5

X = 4

b) 2X -10 +7X +10 = 180

2X +7X = 180

9X = 180

X = 180/9

X = 20

d) 4X - 18 + 3X = 10

4X + 3X = 10 +18

7X = 28

X = 28/7

X = 4

e) 2X +5 +X +7 = 18

2X + X = 18 - 12

3X = 16

X = 16/3

g) 7X +1 = 5X -7

7X -5X = -7 -1

2X = -8

X = -8/2

X = 4

h) 4X +5 = X +20

4X - X = 20 - 5

3X = 15

X = 15/3

X = 5

j) 2(X +5) -4 = 26

2X +10 - 4 = 26

2X = 26 -6

2X = 20

X = 20/2

X = 10

k) 3(X +3) -5 = 22

3X + 9 - 5 = 22

3X = 22 -4

3X = 18

X = 18/3

X = 6

m) 3(X +2) = 2(X -7)

3X +6 = 2X -14

3X -2X = -14 -6

-X = -20 . (-1)

X = 20

n) 4(2X - 1) = 3(X+2)

8X - 4 = 3X +6

8X -3X = 6 +4

5X = 10

X = 10/5

X = 2

p) 3(X +3) -1 = 2

3X + 9 -1 = 2

3X = 2 -8

3X = -6

X = -6/3

X = -2

q) 3(X +2) -1 = 2(X+3) -7

3X +6 -1 = 2X +6 - 7

3X -2X = 6 -7 -5

X = -6

s) 3(2X -3) +X = 5

6X - 9 +X = 5

7X = 5 +9

7X = 14

X = 14/7

X = 2

t) 3X +5 +2X +6 = X +27

5X - X = 27 -11

4X = 16

X = 16/4

X = 4

v) 3(3X +8) -5X = X -3

9X + 24 -5X = X -3

4X - X = -3 -24

3X = -27

X = -27/3

X = -9

w) 5(2X - 1) = 3(X +10)

10X - 5 = 3X +30

10X - 3X = 30 +5

7X = 35

X = 35/7

X = 5