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Cloud [144]
3 years ago
12

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

Mathematics
2 answers:
Marina CMI [18]3 years ago
7 0
21+x=30

30-21 is 8

x=8
uysha [10]3 years ago
4 0
Simple 30 -21 gives you 9 then 9 +21 gives you 30 that means x =9
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