Question

Exercícios:
1) Resolva as seguintes equações:
a) 4x – 1 = 3(x – 1)
b) 3(x – 2) = 2x – 4
c) 2(x – 1) = 3x + 4
d)
x
2
–
x
4
= 5
e)
x+2
6
+
x+1
4
= 6

Answer 1

Resposta:

Explicação passo a passo:

1) Resolva as seguintes equações:

a) 4x – 1 = 3(x – 1)

'4x-1=3x-3'

'4x - 3x= - 3+1'

'x = -2'

b) 3(x – 2) = 2x – 4

'3x-6= 2x-4'

'3x-2x=-4+6'

'x= 2'

c) 2(x – 1) = 3x + 4

'2x-2=3x+4'

'-2-4= 3x-2x'

'-6= x'

'x= - 6'

________________

d)

x/2–x/4 = 5

(2x-x)/4='4.5/4'

'x = 20'

________________

e)

(x+2)/6+(x+1)/4= 6

"2(x+2)+3.(x+1)/12= 12.6/12"

"2x + 4 + 3x + 3 = 72"

'5x + 7 = 72'

'5x= 72-7'

'5x = 65'

'x=65/5'

"x = 13"