Question

(24+x)-21=10
(45-y)+18=58
(y-35)+12=32
56-(x+12)=24
55-(x-15)=30

Answer 1

(24+х)-21=10
24+х=10+21
24+х=31
х=31-24
х=7

(45-у)+18=32
45-у=32-18
45-у=14
у=45-14
у=31

(у-35)+12=32
у-35=32-12
у-35=20
у=20+35
у=55

56-(х+12)=24
х+12=56-24
х+12=32
х=32-12
х=20

55-(х-15)=30
х-15=55-30
х-15=25
х=25+15
х=40