Question

a) 2.x - 6 = -x + 15
b) 4. (x + 3) = 1
c) 5. (2.x - 4) = 7.(x + 1) - 3
d) 3. (x - 2) = 2.x - 4
e) 2. (x - 1) = 3.x + 4
f) 4.(x + 5) + 3. (x + 5) = 21


Alguém me ajuda por favor, preciso urgente!!!!!

Answer 1

a)

2x - 6= - x + 15

2x + x= 15 + 6

3x= 21

x= 21/3

x= 14

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b)

4(x + 3)= 1

4x + 12= 1

4x= 1 - 12

4x= - 11

x= - 11/4

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c)

5(2x - 4)= 7(x + 1) - 3

10x - 20= 7x + 7 - 3

10x - 7x= 7 - 3 + 20

3x= 24

x= 24/3

x= 8

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d)

3(x - 2)= 2x - 4

3x - 6= 2x - 4

3x - 2x= - 4 + 6

x= 2

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e)

2(x - 1)= 3x + 4

2x - 2= 3x + 4

2x - 3x= 4 + 2

- x= 6 >>.(-1)

x= - 6

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f)

4(x + 5) + 3(x + 5)= 21

4x + 20 + 3x + 15= 21

4x + 3x= 21 - 20 - 15

7x= - 14

x= - 14/7

x= - 2