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How do I solve this linear equation? 21+x=30

How do I solve this linear equation? 21+x=30
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2 votes
How do I solve this linear equation?
21+x=30

asked
User Ayo
by
7.5k points

2 Answers

2 votes
simple 30 -21 gives you 9 then 9 +21 gives you 30 that means x =9
answered
User Danila Polevshchikov
by
7.5k points
6 votes
21+x=30

30-21 is 8

x=8
answered
User Euli
by
8.1k points
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