תשובה: # y = 3 # # x = 2 # הסבר: # x + y = 5 # # 3x-y = 3 # # y = 5-x # # 3x- (5-x) = 3 # # y = 5-x # # 3x-5 + x = 3 # # y = 5-x # # 4x = 8 # # y = 3 # # x = 2 #
