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Solve for: 21b-15a
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Calculus
Solve for: 21b-15a
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Topics
Algebra
Calculus
Geometry
Number Theory
Probability
Statistics
Trigonometry
Expression: $21b-15a$
Rewrite $-15$ as $5\cdot 3$
$=7\cdot 3b+5\cdot 3a$
Factor out common term $3$
$=3(7b-5a)$
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