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Resolvemos:
6 (2+ 3x) + 3 (x - 4) = 63
12 + 18x + 3x - 12 = 63
18x + 3x + 12 - 12 = 63
21x + 0 = 63
21x = 63
x = 63/21
x = 3
Respuesta.
x = 3
VERIFICAMOS LA SOLUCIÓN
6 (2+ 3x) + 3 (x - 4) = 63
6 (2 + 3 * 3) + 3 (3 - 4) = 63
6 (2 + 9) + 3 (- 1) = 63
6 (11) - 3 = 63
66 - 3 = 63
63 = 63
La solución es correcta!!!
6.(2+3x)+3.(x-4)=63
Aplicamos la propiedad distributiva:
12 + 18x + 3x - 12 = 63
18x + 3x + 12 - 12 = 63
21x + 0 = 63
21x = 63 - 0
21x = 63
x = 63 ÷ 21
x = 3 → Respuesta
Comprobación:
6 (2+ 3x) + 3 (x - 4) = 63
6 (2 + 3 × 3) + 3 (3 - 4) = 63
6 (2 + 9) + 3 (- 1) = 63
6 (11) - 3 = 63
66 - 3 = 63
63 = 63 → Cumple la igualdad
El ejercicio ha sido desarrollado correctamente.