5,3/8у+2,25у-1,9/16у= при у=4

Question

5,3/8у+2,25у-1,9/16у= при у=4

Answer 1

00025.422 я думаю так.

Answer 2

5.3/8у+2,25у-1.9/16у=
=5.3/8у+2.1/4у-1.9/16у=
=43/8у+9/4у-25/16у=86у+36у-25/16у=86у+36у-25у=97у=97*4=388