Question

encontre a solucao das seguintes equacoes​

a) 5x=2x+3
b)3(2-2x)=-7x
c)4(2-2x)+7x=5(3+2x)
d)6(x-3)=7(x+1)-16​

Answer 1

Olá...

a)

5x = 2x + 3

5x - 2x = 3

3x = 3

x = 3/3

x = 1

b)

3(2 - 2x) = - 7x

6 - 6x = - 7x

- 6x + 7x = - 6

x = - 6

c)

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

8 - 8x + 7x = 15 + 10x

8 - x = 15 + 10x

x - 10x = 15 - 8

- 11x = 7⇒( - 1)

11x = - 7

x = - 7/11

d)

6(x - 3) = 7(x + 1) - 16

6x - 18 = 7x + 7 - 16

6x - 18 = 7x - 9

6x - 7x = - 9 + 18

- x = 9 ⇒(- 1)

x = - 9

Espero ter ajudado.​