Question

resolver a equação 7/20 + (9x)/2 + 4 + (7x)/4 + 1,4 = 12x.

Answer 1

7/20 + (9x)/2 + 4 + (7x)/4 + 1,4= 12x

faça o mmc de 2, 4 e 20 = 20

passarei tudo para o denominador 20;

7 + 90x + 80 + 35x + 28= 240x

240x - 90x - 35x= 80 + 7 + 28

115x = 112

x = 115/112

Answer 2

Resposta:

1,4 = [14/10]/2 => 7/5

7/20 + (9x)/2 + 4 (7x)/4 + 7/5 = 12x

[7/20 + 7/5] + 4 + [9x/2 + 7x/4] - 12x = 0

(35+140)/100 + 4 + (18x + 7x)/4 - 12x = 0

(175/100)/25 + 4 + (25x)/4 - 12x = 0

(7/4) + 4 + (25x - 48x)/4 = 0

(7 + 16)/4 + (-23x)/4 = 0

25/4 = (23x)/4  

92x = 100

x = 100/92  

x = 25/23

Explicação passo-a-passo: