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2 years ago

Solve the equation 3x-4y=16 for x

Mathematics

2 answers:

dolphi86 [110]2 years ago

5 0

Hi there!

One little tip of advice I would like to give you is that when solving equations with 2 variables, and you're looking for only one, the second will always end up in your answer. So, since we're solving for x, the y will end up in our equation. :D

Let's begin!

$3x - 4y = 16$

Step 1) Add 4y to both sides.

$3x - 4y + 4y = 16 + 4y 3x = 4y + 16$

Step 2) Divide both sides by 3.

$\frac{3x}{3} = \frac{4y + 16}{3}$

$x = \frac{4}{3} y + \frac{16}{3}$

Final answer -

$x = \frac{4}{3} y + \frac{16}{3}$

If you wanted to see this graphed, however, see the attached file. :)

Hope this helps!

Message me if you need anything else! I'd be happy to help! :D

Alex Ar [27]2 years ago

4 0

3x-4y=16
add 4y to both sides
3x=4y+16
divide both sides by 3
x=(4y+16)/3

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