Question

Resolver las siguientes ecuaciones con varias incognitas:
5-x= 3-2x
b) 10 + x = 3x
c) 2x - 7 =5x + 2
d) 5x - 2x + 1 = x -11
e) x + 2x + 1 = x - 11
f) x + 8 = 2x - 8 + 3x
g) 6x + 7 - 2x = -x - 8
h) -9 - 7x = 6 - 2x - 10

Answer 1

5-x= 3-2x
2x - x = 3 - 5
X = - 2

b) 10 + x = 3x
10 = 3x - x
10 = 2x
10/2 = x
X. = 5

c) 2x - 7 =5x + 2
-7 - 2 = 5x - 2x
-9 = 3x
-9/3 = x
X = - 3

d) 5x - 2x + 1 = x -11
3x + 1 = x - 11
3x - x = - 11 - 1
2x = - 12
X = - 12/2
X = - 6

e) x + 2x + 1 = x - 11
3x + 1 = x - 11
3x - x = - 11 - 1
2x = - 12
X = - 12/2
X = 6

f) x + 8 = 2x - 8 + 3x
X + 8 = 5x - 8
8+8 = 5x - x
16 = 4x
16/4= x
X = 4

g) 6x + 7 - 2x = -x - 8
4x + 7 = - x - 8
4x +x = - 8-7
5x = - 15
X = - 15/5
X = - 3

h) -9 - 7x = 6 - 2x - 10
-9 - 7x = - 2x - 4
-9+4 = - 2x + 7x
-5 = 5x
-5/5 = x
X. = - 1