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Contact [7]
3 years ago
14

SCHOOL START TOMORROW HELPPP PLEASEEE. JUST NUMBER 3

Mathematics
1 answer:
Lelu [443]3 years ago
4 0

Answer:

Equation: x-(-2)=21

Solution: x=19

Step-by-step explanation:

A number decreased by -2 is equal to 21.

Let's call the number,x. Decreased means we are going to subtract.

x-(-2)=21

-(-2) is just +2:

x+2=21

Subtract 2 on both sides:

x=21-2

Simplify:

x=19

So if 19 is decreased by -2 we should get 21.

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