Раскройте скобки, приведите подобные члены и вычислите значение полученного выражения. а)3(x+y)+5(2x+y+1) при х = 1/13, y=-3/8; б)2x(x-у)-x(2x-3y+2) при х = -2/3, у=3/4; в)4a(1/4a+1)-2a(0,5+2+0,9b) при a=-1/3, b=-2/3; г)-2a(1 1/2a+4)-3a(-a-b+2/3) при a=6, b=2/3.

6534:3=2178(теннге)- 1 домбра                                                                                                                  6534*2=13068(т)-2 гитары                                                                                                                                2178*2=4356(т)-2 домбры                                                                                                    13068-4356=8712(т)-больше                                                                                                              

6534:3=2178(теннге)- 1 домбра                                                                                                                  6534*2=13068(т)-2 гитары                                                                                                                                2178*2=4356(т)-2 домбры                                                                                                    13068-4356=8712(т)-больше