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Expresiones algebraicas: valor numérico

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Cuestionario sobre valor numérico

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Expresiones algebraicas: valor numérico
 

Expresiones algebraicas: valor numéricoOnline version

Cuestionario sobre valor numérico

by PAOLA MICHELLE RAMOS GARCIA
1

Evalúa: 3x + 5 para x = 2.

2

¿Cuál es el valor de 2(a − 3) si a = 7?

3

Encuentra el valor de x en 4x − 9 = 7.

4

Calcula 5(y + 2) con y = −1.

5

Evalúa 6 − 2t para t = 4.

6

Determina el valor de 3(2x − 5) con x = 3.

7

Si v = 2 y la expresión es 7v + 1, ¿cuál es su valor?

8

Valor de k si 8k = 48.

9

Evalúa (x − 4) cuando x = 9.

10

Calcula 3(a + b) con a = 2, b = −3.

Explicación

Sustituye x por 2: 3(2)+5=6+5=11.

2(7−3)=2·4=8.

4x=16 => x=4.

5(−1+2)=5·1=5, pero contexto: error de fórmula. Correcto resultado: 5, no −15.

6−2·4=6−8=−2.

3(2·3−5)=3(6−5)=3·1=3.

7·2+1=14+1=15.

k=48/8=6.

9−4=5.

3(2−3)=3(−1)=−3.

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