7х = 56
х = 56÷7
х = 8
(502-2) × а = 1000
500а = 1000
а = 1000÷500
а = 2
х+30×5=365
х+150=365
х=365-150
х=215
х÷4=100-22
х÷4=78
х=78×4
х=312
1)x*7=330-274 2)(502-2)*a=1000 3) x+30*5=365 4)x/4=100-22
x*7=56 500*a=1000 x+30=365/5 x/4=78
x=56/7 a=1000/500 x+30=57 x=78*4
x=8 a=2 x=57-30 x=312
x=27
