1)5x - 6 = 8x + 3 verificacion 5.
( - 3) - 6 = 8.
( - 3) + 3
5x - 8x = 3 + 6 - 15 - 6 = - 24 + 3 - 3x = 9 - 21 = - 21
x = 9 : ( - 3)
x = - 3
2)8x - 10 = - 10x + 3 verificacion 8.
13 / 18 - 10 = ( - 10).
13 / 18 + 3
8x + 10x = 3 + 10 52 / 9 - 10 = - 65 / 9 + 3
18x = 13 ( - 38 / 9) = ( - 38 / 9)
x = 13 : 18
x = 13 / 18
3) 4x - 5 = 2x - 1 verificacion 4.
2 - 5 = 2.
2 - 1 4x - 2x = - 1 + 5 8 - 5 = 4 - 1 2x = 4 3 = 3 x = 4 : 2 x = 2
4) 6(x + 3) = 8(x + 1) verificacion 6(5 + 3) = 8(5 + 1) 6.
X + 6.
3 = 8.
X + 8.
1 30 + 18 = 40 + 8 6x + 18 = 8x + 8 48 = 48 6x - 8x = 8 - 18 - 2x = - 10 x = - 10 : - 2 x = 5
5) 7(x + 1) = - 3(x - 4) 7(1 / 2 + 1) = - 3(1 / 2 - 4) 7.
X + 7.
1 = - 3.
X - 3.
( - 4) 7 / 2 + 7 = - 3 / 2 + 12 7x + 7 = - 3x + 12 21 / 2 = 21 / 2 7x + 3x = 12 - 7 10x = 5 x = 5 : 10 x = 5 / 10 x = 1 / 2
la verificacion comprueba q estan bien hechas.