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Alex23452
a fost răspuns

calculati a)a/5+2a/5+7a/5
b) 3/2a+4/5a+1/4a
c) 2a/5+3b/7+3a/5+4b/7

Răspuns :

Renatemambouko
a)a/5+2a/5+7a/5=10a/5=2a

b) 3/2a+4/5a+1/4a=(30+16+5)/20a=51/20a

c) 2a/5+3b/7+3a/5+4b/7 =5a/5+7b/7=a+b