Question

ME AJUDEM POR FAVORRRRR

Efetue as Equações abaixo:

a) 7 ( x - 2 ) = 5 ( x + 3 )
b) 2 ( x - 5 ) + 4 ( x - 1 ) = 0
c) 3 ( 2x - 1 ) = -2 ( x+ 3 )
d) 7 ( x - 1 ) - 2 ( x - 5 ) = x - 5

Answer 1

a)

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

7x - 14= 5x + 15

7x - 5x= 15 + 14

2x= 29

x= 29/2

x= 14,5

b)

2(x - 5) + 4(x - 1)= 0

2x - 10 + 4x - 4= 0

2x + 4x= 0 + 10 + 4

6x= 14

x= 14/6

c)

3(2x - 1)= - 2(x + 3

6x - 3= - 2x - 6

6x + 2x= - 6 + 3

8x= - 3

x= -3/8

d)

7(x - 1) - 2(x - 5)= x - 5

7x - 7 - 2x + 10= x - 5

7x - 2x - x= - 5 + 7 - 10

4x= - 8

x= -8/4

x= -2