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Ответ

Автор - valiyeva55
15х -1 =29
15х=29+1
15х=30
 х =30 :15
 х =2
проверка:
15*2 -1 =29
 
9у +73 =109
9у =109 -73
9у=36
у = 36 :9
у =4
проверка:
9*4+73 =109
 
67 -z :28 =52
z : 28=67 - 52
z : 28 =15
z =28 *15
z=420
проверка: 
67 - 420:28=52
z

Ответ

Автор - Alexnba
1) 15х=29+1
15х=30
х=30/15
х=2
2) 9у=109-73
9у=36
у=4
3) 67-52=z:28
15=z:28
z=28*15
z=420

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