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Lubov Fominskaja [6]
3 years ago
10

4n+?=20 please help me

Mathematics
2 answers:
patriot [66]3 years ago
8 0
4×2=8 so n=2 and 8+12=20 so ?=12
dexar [7]3 years ago
4 0
Put. -4n+20 in the ? Because 4n+?=20
4n+ -4n+20=20
The 4n cancel and both sides equal 20 for the check

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