Question

resolva as equações a) 3x+8=2x+1 b)3x+2x+1=7-4x c)5x+12x+4=5x+12 d)7x+1=8x+2​

Answer 1

a)

3x + 8= 2x + 1

3x - 2x= 1 - 8

1x= - 7

x= - 7/1

x= - 7

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b)

3x + 2x + 1= 7 - 4x

3x + 2x + 4x= 7 - 1

9x= 6

x= 6/9

x= 2/3

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c)

5x + 12x + 4= 5x + 12

5x + 12x - 5x= 12 - 4

12x= 8

x= 8/12

x= 2/3

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d)

7x + 1= 8x + 2

7x - 8x= 2 - 1

- 1x= 1>> .(-1)

1x= - 1

x= - 1/1

x= - 1