3(2x − 2) = 2(3x + 9)3(4x + 7) = (4x - 25) 7x + 15 = 3(3x - 7)3x - 4y = 17Alguien que me ayude porfavor?
3(2x − 2) = 2(3x + 9) 3(4x + 7) = (4x - 25) 7x + 15 = 3(3x - 7) 3x - 4y = 17 Alguien que me ayude porfavor?
En resumen
1. ) 3(x - 2) = 2(3x + 9) 3x - 6 = 6x + 18 - 18 - 6 = 6x - 3x - 12 = 3x - 4 = x 2. ) 3(4x + 7) = 4x - 25 12x + 21 = 4x - 25 12x - 4x = - 25 - 21 8x = - 46 x = - 23 / 4 3. ) 7x + 15 = 3(3x - 7) 7x + 15 = 6x - 21 7x - 6x = - 21 - 15 x = - 36 4.
Mejor respuesta
4
1. ) 3(x - 2) = 2(3x + 9)
3x - 6 = 6x + 18 - 18 - 6 = 6x - 3x - 12 = 3x - 4 = x
2.
) 3(4x + 7) = 4x - 25
12x + 21 = 4x - 25
12x - 4x = - 25 - 21
8x = - 46
x = - 23 / 4
3.
) 7x + 15 = 3(3x - 7)
7x + 15 = 6x - 21
7x - 6x = - 21 - 15
x = - 36
4.
) 3x - 4y = 17
3x - 17 = 4y
(3x - 17) / 4 = y.