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Ajhdhv
a fost răspuns

7,75= (8,5+x):2 ????

Răspuns :

7,75 = ( 8,5 + x ) • 2
7,75 = 19 + 2x
-2x = -7,75 + 19
-2x = -8,25
-x = -4,125
x = 4,125
Emmch
8,5+X= 7,75×2
8,5+X=15,5
X=15,5-8,5=7
X=7