Question

What is the value of a in the equation 5a – 10b = 45, when b =3?a)3b)15c)21d)39

Answer 1

Given the question, the following are the solution steps to answer the question.

STEP 1: Write the given equation

`5a-10b=45`

STEP 2: Substitute 3 for b in the equation

`5a-10(3)=45`

STEP 3: Simplify the equation to solve for a

`\begin{gathered} 5a-30=45 \\ 5a=45+30 \\ 5a=75 \\ a=(75)/(5) \\ a=15 \end{gathered}`

Hence, the value of a is 15