Question

questão 18:resolva as equações
a)2x-4=3-6x
b)3x-5=2x+7
c)3x+7=2x+8
d)3x-8=16-5x
e)4x+13= -6x+9
f)12x-9= 3x-12


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Answer 1

a)2x-4=3-6x

2x + 6x = 3 + 4

8x = 7

x = 7/8

x = 0,875

b)3x-5=2x+7

3x - 2x = 7 + 5

1x = 12

x = 12

c)3x+7=2x+8

3x - 2x = 8 - 7

1x = 1

x = 1

d)3x-8=16-5x

3x + 5x = 16 + 8

8x = 24

x = 24/8

x = 3

e)4x+13= -6x+9

4x + 6x = 9 - 13

10x = - 4

x = - 4 / 10

x = - 0,4

f)12x-9= 3x-12

12x - 3x = - 12 + 9

9x = - 3

x = - 3 / 9

x = - 0,33