Factor out common factor: Simplify the expression by factoring out the common factor of 6. 12b+78=6(2b+13)
Check for factor 10: Check if 10 is a factor of the simplified expression 6(2b+13). Since 10 is not a factor of 6 and 10 does not divide 2b+13 without knowing the value of b, 10 cannot be a factor of the entire expression.