Question

5) Resolva as seguintes equações do 1º grau:
a) -7x - 2 = 8
b) X + 3 X- 1 - 5 = x
c) 3 (x-1) - 7 = 15
d) 7x - 28= 2x - 3
e) 3 (3x - 1) = 2 ( 3x + 2)
f) 7 (x - 2) = 5 (x+3)
g) 3(2x - 1) = -2 ( x + 3)
h) 5x - 3 (x + 2) = 15
i) 6x/2 = 2x - 9
j) 5x - 2/10 = 0​

Answer 1

Resposta:

ok. vc agora observa e complete as outras letras.

Explicação passo-a-passo:

a) x/5=21/35 -> 25x= 5x21 -> x= 105/25 -> x=4,2

b) 3/4 / 1/5 = 90/x -> 3*5 /4*1 = 90/x -> 15x=4*90 -> x= 360/15 ->x= 24

c) 9/13 = x/26 -> 9x26 =13x -> x = 234/13 -> x= 18.