3(4x + 6) - 9x
Apply the Distributive Property:
3 (4x) + 3 * 6 - 9x
Multiply by 4 by 3 to get 12:
12x + 3 * 6 -9x
Multiply 3 by 6 to get 18:
12x + 18 - 9x
Subtract 9x from 12x to get 3x:
3x + 18
Your answer is the second option!
Solution: She has £36 remaining.
To solve this is fairly simple. First we multiple 72 by .4 to get 40%. This gives us 28.8.
We then subtract 28.8 by 72 to get the money she has remaining after she spends 40%. The answer to this is 43.2
Then she spends 1/6 on makeup. So we divide 43.2 by 6 and multiply again by 5, which gives us 36.
20% of $20 is 4. So $4 divided by two people is $2.
$2 is your answer.
5y-x=10
Isolate the variable
add x to both sides
5y-x+x=10+x
5y=10+x
Divide both sides by 5
5y/5=10+x/5
y=2+1/5x
So y is equal to 2+1/5x
