solve for b then find the value of b when a = 3

Question

4a = 2b − 7

a.-9/2
b.5/2
c.19/2
d.17

Answer 1

To solve for b, we need to isolate it on one side of the equation. Let's start with the given equation:

4a = 2b - 7

We want to isolate b, so let's add 7 to both sides of the equation:

4a + 7 = 2b

Next, divide both sides of the equation by 2:

(4a + 7)/2 = b

Simplifying the equation further, we have:

2a + 3.5 = b

Now, substitute a = 3 into the equation:

2(3) + 3.5 = b
6 + 3.5 = b
9.5 = b

Therefore, when a = 3, b = 9.5.

The correct answer is not listed among the options provided.