0,8*(4,7у-0,38)+40,04=45
0.8*(4.7y-0.38)+40.04=45
3.76y - 0.304 + 40.04 = 45
3.76y = 45 + 0.304 - 40.04
3.76y = 5.264
y = 5.264 / 3.76
y = 526.4 / 376
y = 1.4
3,76у-0,34=4,96. 3,76у=5,3. у=1,4