A = 40; a+347 = 387; a-39 = 1
a = 53; a+347 = 400; a-39 = 14
a = 282; a+347 = 629; a-39 = 243
a = 558; a+347 = 905; a-39 = 519
Sin^2x+cos^2x=1
-3sin^2x+6cos^2x=3
6^(12-х)=36^х
6^(12-х)=6^2х
12-х=2х
2х+х=12
3х=12
х=12:3
х=4
16*125*29+2*169=58 000+338=58338
9/10*8=9*8/10=72/10=7 целых 2/10=7 1/5