3 years ago

Simplify (7x)- (-2x). A 5x B-5x C9x D-9x

Mathematics

2 answers:

Scrat [10]3 years ago

7 0

Answer: The correct option is

(C) 9x.

Step-by-step explanation: We are given to simplify the following expression :

$E=(7x)-(-2x)~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)$

We will be using the following rule in simplifying the given expression :

$a-(-b)=a+b.$

From expression (i), we get

$E\\\\=(7x)-(-2x)\\\\=7x+2x\\\\=(7+2)x\\\\=9x.$

Thus, the required simplified form is 9x.

Option (C) is CORRECT.

WITCHER [35]3 years ago

6 0

You answer is C because 7-(-2) is 9 and then u just had an X at the end .

Hope this helps:)

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