Resolver las sisuientes ecuacones a) 7x + 20 = 6x - 15 b) 2x - 5 - 4x = - 12 + 7 c) 4x + x = 8x - 30 d) 5x - 12 = 4x + 14 e) - x + 6 = - 5 + 6x - 3 f) - 2x + 4 - 4x = 28.
En resumen
7x + 20 = 6x - 15 7x - 6x = - 15 - 20 x = - 35 . 2x - 5 - 4x = - 12 + 7 2x - 4x - 5 = - 5 - 2x - 5 = - 5 - 2x = - 5 + 5 - 2x = 0 x = 0 . 4x + x = 8x - 30 5x = 8x - 30 5x - 8x = - 30 - 3x = - 30 x = - 30 / - 3 x = 10 . 5x - 12 = 4x + 14 5x - 4x = 14 + 12 x = 26 .
7x + 20 = 6x - 15
7x - 6x = - 15 - 20
x = - 35
.
2x - 5 - 4x = - 12 + 7
2x - 4x - 5 = - 5 - 2x - 5 = - 5 - 2x = - 5 + 5 - 2x = 0
x = 0
.
4x + x = 8x - 30
5x = 8x - 30
5x - 8x = - 30 - 3x = - 30
x = - 30 / - 3
x = 10
.
5x - 12 = 4x + 14
5x - 4x = 14 + 12
x = 26
.
- x + 6 = - 5 + 6x - 3 - x + 6 = 6x - 5 - 3 - x + 3 = 6x - 8 - x - 6x = - 8 - 6 - 7x = - 14
x = - 14 / - 7
x = 2
.
- 2x + 4 - 4x = 28 - 2x - 4x = 28 - 4 - 6x = 24
x = 24 / - 6
x = - 4.
1)
7x + 20 : 6x - 15
7x - 6x : - 15 - 20
x : - 35 - 35 / x : - 35
2)
2x - 5 - 4x : - 12 + 7
2x - 4x : - 12 + 7 + 5 - 2x : 0
0
3)
4x + x : 8x - 30
4x + x - 8 : - 30 - 3x : - 30 - 30 / - 3 :
10
4)
5x - 12 : 4x + 14
5x - 4x : 14 + 12
x : 26
26 / x
26
5) - x + 6 : - 5 + 6x - 3 - x - 6x : - 5 - 3 - 6 - 7x : - 14 - 14 / - 7
2
6) - 2x + 4 - 4x : 28 - 2x - 4x : 28 - 4 - 6x : 24
24 / - 6 - 4
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