Tradurre una frase in una disuguaglianza in un passaggio

Siamo già stati introdotti alle disuguaglianze, che mostrano la relazione tra due quantità che non sono uguali. Qui vengono fornite frasi, che devono essere tradotte in disuguaglianze a un passaggio.

Rules to write one-step inequalities

• Una frase ha generalmente tre parti, la sinistra, la metà e la destra.

• We proceed from the left part, which usually contains the variable and translate into an expression.

• We write the inequality sign from the middle one.

• We then write the expression for the right part of the sentence, which is usually a number.

The examples below explain the above rules

Nine subtracted from b is greater than or equal to −21

Solution

Step 1:

We start from the left and proceed towards the right

On the left, there is ‘9 subtracted from b’ and on the right, there is ‘−21’ and the inequality ‘greater than or equal to’ in the middle

Step 2:

‘Nine subtracted from b’ translates to b − 9

So, the statement “Nine subtracted from b is greater than or equal to −21” translates to

b −9 ≥ −21

Seven more than ‘a’ is less than or equal to 18

Solution

Step 1:

We start from the left and proceed towards the right

On the left, there is ‘7 more than ‘a’ ’ and on the right, there is ‘18’ and the inequality ‘less than or equal to’ in the middle

Step 2:

‘Seven more than from ‘a’ translates to a + 7

So, the statement “Seven added to a is less than or equal to 18” translates to

a + 7 ≤ 18