Question

Solve for x using cross multiplication

Answer 1

$\frac{x+4}{3} = \frac{x+6}{4}$

I've attached a picture showing how to do the cross multiplication. If you look at that, you'll see that once you cross multiply you get:

3 (x+6) = 4 (x+4)

Then we use the distributive property:

3x + 18 = 4x + 16

Now we need to get all the x's on one side and all the numbers on the other. Start by subtracting 3x from both sides

3x + 18 -3x = 4x + 16 -3x

On the left side they cancel out:

18 = x + 16

Subtract 16 from both sides:

18 - 16 = x + 16 - 16

It cancels out on the right, ans you get:

2 = x

There's your answer :)