In order to add or subtract fractions, they must have the
same denominator. You need to change both of these
fractions to have the same denominator ... without changing
their values, of course.
The smallest common denominator for these fractions is 20 .
3/4 is the same amount as 15/20 .
3/5 is the same amount as 12/20 .
Now that they have the same denominator, you can do
the subtraction.
4(x+2) = 4·x + 4·2 = 4x + 8
3(x+7) = 3·x + 3·7 = 3x + 21
5(2x+7) = 5·2x + 5·7 = 10x + 35
Answer:
5
Step-by-step explanation:
3a+5=20 -5
3a=15 /3
a=5
You will have to add 190 with 95 and that will be 285 because he rides 190 miles in FOUR days and you will need to know the half of 190 to get 2 days because each day he would ride 47.5 miles each day and 47.5+47.5=95.
The Answer is 285.
Answer:
2a + 20b +2xc = 2(a+10b+xc)
Step-by-step explanation:
Let a = one litter box, b = one cat toy and c = a bag of cat food
The 1 litter box = a, 10 cat toys = 10b and x bags of cat food = xc
For one sister, purchase = a + 10b + xc
And for two sisters,
total purchase = 2 x ( a + 10b + xc ) = 2(a+10b+xc)
= 2a + 20b + 2xc
