a) 3 · (x + 5) + 2x = 20
b) 8 · (x – 2) – 6x = 14
c) 2 · (x + 5) + x + 2 = 21
d) 3 · (x – 4) = 2x + 26
e) 5 · (x + 1) = 2x + 17
f) 7x – 5 = 3 · (x + 9)
g) 2 · (3x – 8) = 3x + 5
h) 4(x – 1) + 3(x + 5) = 2x + 41
i) 5 · (7 + 4x) + 2 · (2x + 3) = 2x + 9
Si alguien me ayuda porfis
Respuestas
Respuesta:
a) 3 · (x + 5) + 2x = 20
3x + 15 + 2x= 20
5x +15 = 20
5x = 20 -15
5x = 5
X= 5/5
X=1
b) 8 · (x – 2) – 6x = 14
8x – 16 – 6x = 14
8x – 6x = 14 + 16
2x = 30
X= 30/2
X=15
c) 2 · (x + 5) + x + 2 = 21
2x + 10 + x + 2 = 21
3x + 12 = 21
3x = 9
X= 9/3
X= 3
d) 3 · (x – 4) = 2x + 26
3x – 12 = 2x + 26
3x – 2x = 26 + 12
X= 38
e) 5 · (x + 1) = 2x + 17
5x + 5 = 2x + 17
5x – 2x = 17 – 5
3x = 12
X= 12/3
X= 4
f) 7x – 5 = 3 · (x + 9)
7x – 5 = 3x + 27
7x – 3x = 27 + 5
4x = 32
X= 32/4
X= 8
g) 2 · (3x – 8) = 3x + 5
6x – 16 = 3x + 5
6x – 3x= 5 + 16
3x= 21
X= 21/3
X=7
h) 4(x – 1) + 3(x + 5) = 2x + 41
4x - 4 + 3x + 15 = 2x + 41
7x + 11 = 2x + 41
7x – 2x= 41 – 11
5x= 30
X= 30/5
X= 6
i) 5 · (7 + 4x) + 2 · (2x + 3) = 2x + 9
35 + 20x + 4x + 6 = 2x + 9
41 + 24x = 2x + 9
24x – 2x = 9 – 41
22x = -32
X= -32/22
X= -16/11