22
Объяснение:
(4b+1)+1=90
4b+1+1=90
4b+2=90
4b=90-2
4b=88
b=22
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Answers & Comments
22
Объяснение:
(4b+1)+1=90
4b+1+1=90
4b+2=90
4b=90-2
4b=88
b=22