Х-230=480;324+х=800;700-х=227;х+420=683

x-230=480x=480+230x= 710710-230=480:)))324+x=800x=800-324x=576324+576=800700-x=227x=700-227x=583700-583=227

x-230=480 324+x=800. 700-x=227x=230+480. x=800-324 x=700-227x=710. x=476. x=473