Question

resolva as equações

a) 3x + 2 =2x

b) 9y - 8 = y

c) 8( a + 2 ) = 9a

d) 2 - ( 5s + 7 ) = 7 + s

e) 4( 2x - 10 ) = 2( x - 4 )
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3

pfv PFV me ajudem eu preciso dos cálculos

Answer 1

resolva as equações

a)
3x + 2 =2x

3x -2x = -2

x= -2


b)
9y - 8 = y

9y -Y = 8

8y= 8

y = 8/8

y= 1


c)
8( a + 2 ) = 9a

8a + 16= 9a

8a - 9a = -16

- a = -16 ----> *(-1)

a= 16



d)
2 - ( 5s + 7 ) = 7 + s

2 - 5s -7 = 7 + s

-5s - s= 7 - 2 + 7

- 6s= 12----->*(-1)

6s= -12

s= -12/6

s= -2



e)


$\frac{4.(2x - 10)}{3} = 2( x - 4 ) \\ \\ \frac{8x - 40}{3} = 2x - 8 \\ \\ 8x - 40 = 6x - 24 \\ \\ 8x - 6x = - 24 + 40 \\ \\ 2x = 16 \\ \\ x = \frac{16}{2} \\ \\ x = 8$