Question

1+2=3
2+1=3
4-1=3
5-?=3
90-?=100
???????
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Answer 1

Answer:

1+2=3

2+1=3

4-1=3

5-?=3

90-?=100

?= 10

Answer 2

Answer:

5 - 2 = 3

90 - (-10) = 100

Step-by-step explanation:

hope it helps you