Question

1 • Resolva as equações a seguir:


a) x+3x-1=7


b) -5x+7=13


c) x+2(3-x)=12


d) 10-5x=13-3(x+3)-1


e) 2(4-3x)+14=16-(4x+8)


f) x/2+3=5x/3


g) (2x-1)/3+3/2=x/2-1


h) (4-x)/6=(2x-1)/2+2

preciso para hj!!

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Answer 1

Resposta:

a) x+3x-1=7

4x - 1 = 7

4x = 7 + 1

4x = 8

x = 2

b) -5x+7=13

-5x = 13 - 7

-5x = 5

-x = 1

c) x+2(3-x)=12

x + 6 - 2x = 12

-x + 6 = 12

-x = 12 - 6

-x =6

d) 10-5x=13-3(x+3)-1

10 - 5x = -3x + 9 - 1

10 - 5x = -3x + 8

10 - 8 = -3x + 5x

2 = 2x

1 = x

e) 2(4-3x)+14=16-(4x+8)

8 - 6x + 14 = 16 - 4x -8

6 - 6x = 8 - 4x

6 - 8 = 6x - 4x

2 = 2x

1 = x

f) x/2+3=5x/3

x/2 + 18/6 = 5x/3

3x/6 + 18/6 = 10x/6

3x - 10x = -18

7x = -18

g) (2x-1)/3+3/2=x/2-1

(4x - 2)/6 + 9/6 = 3x/6 -6/6

4x - 2 + 9 = 3x - 6

4x + 7 = 3x - 6

4x - 3x = -7 - 6

x = -13

h) (4-x)/6=(2x-1)/2+2/1

(4 - x)/6 = (6x - 3)/6 + 12/6

4 - x = 6x - 3 + 12

4 - x = 6x + 9

4 - 9 = 6x + x

-5 = 7x