Question

помогите решить двумя способами

56-(x+12)=24
55-(x-15)=30

Answer 1

56-(x+12)=24,
x+12=56-24,
x+12=32,
x=32-12,
x=20,

56-(x+12)=24,
56-x-12=24,
44-x=24,
x=44-24,
x=20;

55-(x-15)=30,
x-15=55-30,
x-15=25,
x=25+15,
x=40,

55-(x-15)=30,
55-x+15=30,
70-x=30,
x=70-30,
x=40.