Question

Equaçoes de primeiro grau.

a) x/6=7

b) 3x+8/5 =4

c) 3x+4/5=2

Answer 1

Vamos aos cálculos.


a) x / 6 = 7
x = 7 * 6
x = 42

b) 3x + 8/5 = 4
3x = 4 - 8/5
3x = 12/5
x = 12/5*1/3
x = 4/5


c) 3x + 4/5 = 2
3x = 2 - 4/5
3x = 6/5
x = 6/5*1/3
x = 2/5

Answer 2

Boa noite!

a) x/6 = 7

x/6=7
x=6×7
x=42



b) 3x+8/5 =4

3x+8/5=4
15x/5 + 8/5 = 4
(15x+8)/5 = 4
15x+8 = 5×4
15x+8 = 20
15x = 20-8
15x = 12
x = 12/15
x = 4/5



c) 3x+4/5 = 2

3x+ 4/5=2
15x/5 + 4/5 = 2
(15x+4)/5 = 2
15x+4 = 5×2
15x+4 = 10
15x = 10-4
15x = 6
x = 6/15
x = 2/5