Question

Resolva as equações 2 e 3,porfavor
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Answer 1

Explicação passo-a-passo:

2)

a) 7x - 3

b) x + 5 - 2x

c)

7x - 3 = x + 5 - 2x

7x - 3 = -x + 5

7x + x = 5 + 3

8x = 8

x = 8/8

x = 1

3)

a)

3x + 1 = 7

3x = 7 - 1

3x = 6

x = 6/3

x = 2

b)

3y - 6 = 2y + 9

3y - 2y = 9 + 6

y = 15

c)

x - 3 = 5

x = 5 + 3

x = 8

e)

6x - 4 = 2x + 8

6x - 2x = 8 + 4

4x = 12

x = 12/4

x = 3

f)

x + 2 = 7

x = 7 - 2

x = 5

g)

7 = x + 12

-x = 12 - 7

-x = 5 .(-1)

x = -5

h)

17x - 2 + 4 = 10 + 5x

17x + 2 = 10 + 5x

17x - 5x = 10 - 2

12x = 8

x = 8/12

x = 2/3

i)

-3 = x + 10

-x = 10 + 3

-x = 13 .(-1)

x = -13

j)

4x - 10 = 2x + 2

4x - 2x = 2 + 10

2x = 12

x = 12/2

x = 6

k)

x - 7 = -7

x = -7 + 7

x = 0