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22moneymorgan
25.07.2019 •
Mathematics
Lucy had $72, which is nine times as much money as xavier had. how much money did xavier have? select the correct solution method below, representing xavier's money with x.
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Ответ:
Lucy has 9 times as much money as Xavier.
Let Xavier money be =x
x = $72 ÷ 9
x = $8
Xavier has $8.
Ответ:
In algebra, we always want to write out what we do know, then make a plan to solve for what we don’t know.
What we do know:
-Lucy had 72 dollars
-Lucy had 9 times more money than Xavier
What we don’t know:
-How much money Xavier had.
Let’s make a plan to solve for what we don’t know.
1. Put What we don’t know as a variable
2. Understand the problem
3. Write equation
4. Write formal equation
5. Solve for answer
Alright, let’s start with step one.
We don’t know how much money Xavier has. In the final equation, we don’t want to write all those words, so let’s put the variable as “x”.
Step two
Let’a understand the problem. We need to find out what number multiplied by 9 is 72.
Step three
Let’s write an easy to understand equation
9 times x(how much money Xavier has) is equal to 72.
Step four
Let’s write the formal equation
9x=72
Step 5
Let’s solve the equation. To get x by itself, we need to divide by 9 on both sides, since it is the opposite of multiplying.
9x/9=72/9
X=8
So, your answer is Xavier has 8 dollars.
The other method is to simply divide 72 by 9, since the problem is asking to multiply.
72/9
I still got 8, which is he same answer.
Hope this helped! Comment if you have any questions! :)
Ответ:
Solve for
a
by simplifying both sides of the equation, then isolating the variable.
Exact Form:
a
=
5
2
Decimal Form:
a
=
2.5
Mixed Number Form:
a
=
2
1
2
Step-by-step explanation:
.