Answer: -6x
Explanation:
Just subtract the coefficients:
The coefficient of 10x is 10
The coefficient of 16x is 16
now do ten minus 16 (TIP: if you don't really like negative numbers, then an easy way of subtracting 10-16 is 16-10=6, then add the negative sign to 6; -6)
10 - 16 = -6
Now put the x back: -6 = -6x
The correct answer is -6x