Question

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copy the statement, replacing the question mark with a number or an expression that makes the statement true.

1. ( 5(4 + ?) = 20 + 5x )
2. ( 2(4 + ?) = 8 + 6x )

Explanation:

Step1: Aplicar propiedad distributiva (ej3)

$5(4 + ?) = 5\times4 + 5\times?$

Step2: Igualar con lado derecho (ej3)

$20 + 5\times? = 20 + 5x$

Step3: Despejar el símbolo (ej3)

$5\times? = 5x \implies ? = x$

Step4: Aplicar propiedad distributiva (ej4)

$2(4 + ?) = 2\times4 + 2\times?$

Step5: Igualar con lado derecho (ej4)

$8 + 2\times? = 8 + 6x$

Step6: Despejar el símbolo (ej4)

$2\times? = 6x \implies ? = 3x$

Answer:

1. $5(4 + x) = 20 + 5x$
2. $2(4 + 3x) = 8 + 6x$