The values of x and y that satisfy this system of equations are 10 and 5 respectively
<h3>Simultaneous equation</h3>
Given the system of equations
x + y = 20
3x - 3y = 30
_____________________
x + y = 20
x - y = 10
Add the equations
2x = 20 + 10
2x = 30
x = 30/2
x = 15
Substitute
x -y = 10
15 - y = 10
y = 5
Hence the values of x and y that satisfy this system of equations are 10 and 5 respectively
Learn more on simultaneous equation here: brainly.com/question/16863577
#SPJ1
There are 12 months in a year
4 months that have 30 days so ratio of the months with 30 days to the months with other than 30 days = 4: 12 = 1:3
Answer:
1 to 3
--------------
24 sedans and 18 sports
Ratio of sedans to sport = 24 : 18 = 4:3
Answer:
4 to 3
---------------
30 inches to 2 feet
2 feet = 24 inches
so 30 inches to 24 inches = 30:24
simplify
= 5 : 4
Answer:
5 to 4
-------------------
36 inches to 4 feet = 36 inches to 48 inches = 36:48
simplify
= 3 : 4
Answer:
3 to 4
Answer:
D. 24
Step-by-step explanation:
Angles are the same, so 84 = 3x.
To get x alone, you divide 3 by both sides.
84/3 = 24
24 = x.
No, the sum of 12 and 15 is 27
