Question

150*х*3=1800
(х+240)*3-360=540
завтра урок

Answer 1

150*х*3=1800
150*х3=1800
х3=1800/150
х3=12
х=12/3
х=4

(х+240)*3-360=-540
(х+240)*3=540+360
(х+240)*3=900
х+240=900/3
х+240=300
х=300-240
х=60