Answer:
y=15
x=43
(any variable can be used, I used x and y to make it easier to show)
Step-by-step explanation:
x+y=58
x-y=28
get x by its self
x=58-y
then subsitute into the other equation
(58-y)-y=28
58-2y=28
-2y=-30
y=15
sub. again
x+15=58
x=43
567 / 18 = 31.5
But because she can't make half a shelf, the answer would be 32 shelves
Answer:
![\displaystyle x = 24](https://tex.z-dn.net/?f=%5Cdisplaystyle%20x%20%3D%2024)
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Equality Properties
- Multiplication Property of Equality
- Division Property of Equality
- Addition Property of Equality
- Subtraction Property of Equality<u>
</u>
Step-by-step explanation:
<u>Step 1: Define</u>
<u />
<u />
<u />
<u>Step 2: Solve for </u><em><u>x</u></em>
- [Multiplication Property of Equality] Cross-multiply:
![\displaystyle 5x = 120](https://tex.z-dn.net/?f=%5Cdisplaystyle%205x%20%3D%20120)
- [Division Property of Equality] Divide 5 on both sides:
![\displaystyle x = 24](https://tex.z-dn.net/?f=%5Cdisplaystyle%20x%20%3D%2024)