Question

calcule: 1 1/5x 3/4 e 9x 2 3/4​

Answer 1

Resposta:

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

9x-3=6x+4

9x-6x=4+3

3x=7

x=7/3

3x-2(4x-3)=2-3(x-1)

3x-8x+6=2-3x+3

3x-8x+3x=2+3-6

-2x=-1

x=1/2

Nesses três últimos aplicarei MMC

x/4 - x/6 = 3

(3x-2x)/12 = 3

x/12=3

x=3.12

x=36

x/2 + 3x/5 = 6

(5x+6x)/10 = 6

11x/10=6

11x=6.10

x=60/11

x/5 + x/2 = 7/10

(2x+5x)/10 = 7/10

7x/10=7/10

7x=7/10.10

7x=70/10

7x=7

x=7/7

x=1