7281 / ( 243 + x - 37) = 9
7281 / ( x + 206) = 9
9( x + 206) = 7281
9x + 1854 = 7281
9x = 7281 - 1854
9x = 5427
x = 5427 / 9
x = 603
lg4^3+lg0.5 lg 64*0.5 lg 32 lg2^5
= ------------- = ---------------- = ----------- = ----------- =5/(-1)= - 5
lg7-lg14 lg 7/14 lg0.5 lg2^(-1)
1)5/10
2)я не поняла что значит:()
3)первый раз:3/6=1/3
4)5/10
24!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!