Question

5. Resolva as equações: a) 5x + 3x = 16 b) 7y - 2 = 5y - 18 c) 4(x + 1) = 24 d) 3y - 2 = 2(y + 7) =​

Answer 1

Resposta:

(a) x=2

(b) y= -8

(c) x= 5

(d) y= 16

Explicação passo a passo:

(a) 5x+3x=16

    8x=16

     x=16/8

     x= 2

(b) 7y-2=5y-18

    7y-5y= -18+2

     2y=-16

      y=-16/2

      y= -8

(c) 4(x+1)=24

    (x+1)=24/4

    x+1= 6

    x= 5

(d) 3y-2=2(y+7)

    3y-2=2y+14

    3y-2y= 14+2

     y= 16