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andrey2020 [161]
3 years ago
15

Perform the

Mathematics
1 answer:
vlabodo [156]3 years ago
5 0

Answer:

Sum = 5x

Step-by-step explanation:

Given

1: 5x + 20

2: Opposite of 20

Required

Find their sum

Suppose that a is a number; The opposite of a is -a. So, the opposite of 20 is -20.

Having said that:

The required sum is:

Sum = 5x + 20 + (-20)

Remove bracket

Sum = 5x + 20 -20

Sum = 5x

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