shaila12sanchez shaila12sanchez 02-03-2021 Geografía contestada AIUDA PLIS DOY 20 PUNTOS ( SUMAS )1 : (3×-2y+1)+(2×+5y-6)2: (4+-3y+13)+(7×+8y-6)3 : (8a×+2by-7cz)+(2by-3ax-7cz)( RESTAS )1 : (5×+6y-8)-(7y-2×-3)2 : (-14xy-9xy+16xy)-(-10×y+19xy+21xy)3 : (×+22×-13×)-(-15×-11×+5×)