Question

Cat face : a supra 19+11a supra 19+7a supra 19

Answer 1

$\frac{a}{19} +\frac{11a}{19} + \frac{7a}{19}= \frac{a+11a+7a}{19}= \frac{19a}{19}=a.$

Answer 2

a/19+11a/19+7a/19

avem acelasi numitor, deci le scriem sub aceeasi nilie de fractie

a+11a+7a/19=
19a/19

simplificam 19 cu 19 si ramane a