Question

Solve for b then find the value of b when a=3
4a=2b-7

Answer 1

To solve for b, we need to isolate b on one side of the equation.

Begin by adding 7 to both sides of the equation:
4a + 7 = 2b

Next, divide both sides of the equation by 2 to solve for b:
(4a + 7) / 2 = b

Now we can substitute a = 3 into the equation to find the value of b:
(4(3) + 7) / 2 = b
(12 + 7) / 2 = b
19 / 2 = b
9.5 = b

So, when a = 3, b = 9.5.