1)(24х+х)-21=10 2)(45-у)+18=58
24х+х-21=10 45-у+18=58
25х=10+21 у=58-18-45 -
25х=31 у= -5 -
х=31:25
х=1,24
3)(у-35)+12=32
у-35+12=32
у=32-12+35
у=55
4)56-(х-15)=24
56-х+15=24
х=24-56-15
х=-47
5)24,55-(х-15)=30
24,55-х+15=30
-х=30-24,55-15
-х=-9,55
1)(24х+х)-21=10 2)(45-у)+18=58
24х+х-21=10 45-у+18=58
25х=10+21 у=58-18-45 -
25х=31 у= -5 -
х=31:25
х=1,24
3)(у-35)+12=32
у-35+12=32
у=32-12+35
у=55
4)56-(х-15)=24
56-х+15=24
х=24-56-15
х=-47
5)24,55-(х-15)=30
24,55-х+15=30
-х=30-24,55-15
-х=-9,55
38 + b = 840 : 12
b = 70 - 38
b = 32
•••••••••
14( p - 30 ) = 630
p - 30 = 630 : 14
p = 45 + 30
p = 75
•••••••••
( 43 - s ) • 17 = 289
43 - s = 289 : 17
- s = 17 - 43
s = 26