Multiplicative Inverses (Reciprocals)
What is the reciprocal of 3/4?
4/3
3x+2=20
6
Four less than five times a number is equal to 11.
5n-4=11
5a+21=8a
7
-3(9+x)=33
-20
1/5x=12
60
5+2n=-1
-3
1/4n-7=-1
3x-7=8x+23
-6
-8(w-6)=32
2
-2/9d=4
-18
2/5r-5=7
30
The quotient of a number and 5, less 10, is 3
n/5-10=3
8y-3=6y+7
10
-12(k+4)=60
-9
3/5n=15
9
5x-9=16
5
John saved $725 for new drums and lessons. His drums cost $475 and lessons are $25 per hour. Determine how many hours of lessons can she afford.
x number of hours
475+25x=725
10 hours
5p+2=4p-1
-3
8(3a+6)=9(2a-4)
-14
3/4p=60
80
3-8c=35
-4
The cost for a certain music plan is $9.99 per year plus $0.25 per song you download. If you paid 113.74 one year, find the number of songs you downloaded.
0.25s+9.99=113.74
415 songs
11x =24+8x
8
8(c-9)=6(2c-12)-4c
Identity or all real numbers