11 Теңдеулерді шеш.
8y - 345 = 455
630 : (150 - x) = 70
35+ (b + 165) = 658
400 (x - 5) = 10 000
8y - 345 = 455
630 : (150 - x) = 70
35+ (b + 165) = 658
400 (x - 5) = 10 000
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8y - 345 = 455
8у-345=455
8у=345+455
8у=800
у=800:8
у=100
630 : (150 - x) = 70
150-х=630:70
150-х=9
х=150-9
х=141
35+ (b + 165) = 658
35+b+165=658
b=658-165-35
b=458
400 (x - 5) = 10 000
400x - 2 000 = 10 000
400х = 10 000 + 2 000
400х = 12 000
х = 12 000 : 400
х = 30