Answer:
r = -4/5
Step-by-step explanation:
Divide both sides by 15 so you have r
-12/15 simplify (both by 3)
-4/5
Answer:
x = 9
Step-by-step explanation:
3x - 7 = 20
3x = 20 + 7
3x = 27
x = 9
Answer:
Infinitely many solutions
Step-by-step explanation:
By multiplying the entire top equation by two, you'll find that both of these equations are actually technically the same, meaning that there are infinitely many solutions to this system.
5/10=1/2
4/12=1/3
3/9=1/3
6/9=2/3
2/16=1/8
10/40=1/4
2/4=1/2
6/18=1/3
4/20=1/5
9/27=1/3
7/27---- something wrong with this
8/36=2/9