Автор - grhk8igrsdfvnju4dcj
(120:x-3):2+5=11.
(120:x-3):2=11-5
(120:x-3):2=6
120:x-3=6*2
120:x-3=12
120:x=15
120=15x
120:15=x
8=x
(120÷х-3)÷2+5=11
(120÷х-3)÷2=11-5
(120÷х-3)÷2=6
120÷х-3=6×2
120÷х-3=12
120÷х=12+3
120÷х=15
х=120÷15
х=8