Queremos tener todos los variables del mismo typo en un lado así que vamos a mover la -x a la izquierda, y el 15 a la derecha.
15 + 3x = 21 - x
+x +x
————————
15 + 4x = 21
-15 -15
———————
4x = 6
— —
4 4
X = 1.5 para ver si es correcto puedes tratar de poner 1.5 en lugar de la x y te saldrá una ecuación correcta :), déjame saber si tienes preguntas espero que eso hizo sentido.
Answer:
x^2 - 6x - 4 = x^2 - 6x + 9 - 13 = x^2 - 2.x.3 + 3^2 - 13
= (x-3)^2 - 13
(m = -3 and n = -13)
Answer:
x=4
Step-by-step explanation:
3x+5=17 is the equation you need to setup as all square sides are equalivent. Simplify the equation getting 3x=12, Divide all terms by 3 and you get x=4.
Answer:
Step-by-step explanation:
The signs + and - would equal to a subtraction sign since the signs are opposite of each other.
That would make the equation:
2 - 3 = ?
The answer would be -1.
