Question: How do you write the expression for: the sum of twice a number and half the number is 10?
Answer: 2 times a number plus half a number must equal 10, therefore let the number be a. So 2 times a plus half of a is equal to 10
2(a)+ \(\displaystyle\frac{1}{2} \) (a)=10
so is equal
2a + \( \displaystyle\frac{a}{2} \) =10