arianajoaneily01 arianajoaneily01 17-12-2020 Mathematics contestada I REALLY NEED HELP THIS IS DUE TODAY AND IT'S 1:57 PLEASE HELP!!!! -6 X ?= -18 -2 x ? = 20 -? x -10=-70 -7 x ?= -28 -? x -7= 49 -3 x ? =21