3(b-7)+6 =33-3b
3b-21+6=33-3b
3b-15=33-3b
3b+3b=33+15
6b=48
b=8
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3(b-7)+6 =33-3b
3b-21+6=33-3b
3b-15=33-3b
3b+3b=33+15
6b=48
b=8