Solve the equation for the indicated variable ab+9=3b-5c for b

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asked Sep 4, 2015 213k views

1 vote

Solve the equation for the indicated variable ab+9=3b-5c for b

Mathematics
high-school

Abhishek J asked

by Abhishek J

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$ab+9=3b-5c \ \ |-3b\\ \\ -3b+ab +9=3b-3b-5c \\ \\ -3b +ab+9=-5c \ \ | -9 \\ \\-3b+ab+9 -9=-5c-9 \\ \\-3b +ab =-5c-9 \ \ / \cdot (-1) \\ \\ 3b-ab =5c+9 \\ \\b(3-a)=5c+9 \ \ /:(3-a)\\ \\b=(5c+9)/(3-a)$

Tuno answered Sep 9, 2015

by Tuno

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