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5x = 8x - 15
5x - 8x = - 15
- 3x = - 15
x = - 15/-3
x = 5
Respuesta.
x = 5
VERIFICAMOS.
3x + 2x = 8x - 15
3 (5) + 2 (5) = 8 (5) - 15
15 + 10 = 40 - 15
25 = 25
La solución es correcta.
3x + 2x = 8x - 15
5x = 8x - 15
15 = 8x - 5x
15 = 3x
15/3 = x
5 = x
x = 5
Comprobación.
3x + 2x = 8x - 15
3(5) + 2(5) = 8(5) - 15
15 + 10 = 40 - 15
25 = 25