Question

1. Resolva as equações.
a) 3×+2=×+5
b) 16×-52=4×-4
c) 7.(x-6)=21
d) 2.(x-17)=-×/2
e) ×=3×/5-2
f) 4.(×+2)=x+1, 1

Answer 1

Boa tarde!


a)

3x + 2 = x +5

3x -x = 5 -2

2x = 3

x= 3/2


b)

16x -52 = 4x -4

16x -4x = -4 + 52

12x = 48

x = 48/12

x= 4


c)

7.(x -6) = 21

7x - 42 = 21

7x = 21+ 42

7x = 63

x= 63/7

x=9


d)

2.(x-17) = -x /2

2x -34 = -x/2

4x -68 = -x

4x +x = 68

5x = 68

x= 68/5

x=13,6

e)

x = 3x/5-2

x= 3x /3

x = 1


f)


4.(x +2) =x + 1,1

4x +8 = x +1,1

4x -x = 1,1 -8

3x =-6,9

x= -6,9/3

x= -2,3

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