Answer:
-y = 2.
Step-by-step explanation:
2x + 7y= 4
- 2x – 8y = -2
Adding we eliminate x because 2x + -2x = 0:-
0 - y = 4 + -2
-y = 2.
Answer:
The cost for a child is $7 and the cost for an adult is $50
Step-by-step explanation:
Let 'x' represent children
Let 'y' represent adults
The equations used to come to this answer are:
![3x + 2y = 121 \\ 5x + 1y = 85](https://tex.z-dn.net/?f=3x%20%2B%202y%20%3D%20121%20%5C%5C%205x%20%2B%201y%20%3D%2085)
![3x + 2y = 121 \\ 5x( - 2) + 1y( - 2) = 85( - 2) \\ \\ 3x + 2y = 121 \\ - 10x - 2y = - 170 \\ - 7x = - 49](https://tex.z-dn.net/?f=3x%20%2B%202y%20%3D%20121%20%5C%5C%205x%28%20-%202%29%20%2B%201y%28%20-%202%29%20%3D%2085%28%20-%202%29%20%5C%5C%20%20%5C%5C%203x%20%2B%202y%20%3D%20121%20%5C%5C%20%20-%2010x%20-%202y%20%3D%20%20-%20170%20%5C%5C%20%20-%207x%20%3D%20%20-%2049)
Therefore; x = 7
![5x + 1y = 85 \\ 5(7) + y = 85 \\ 35 + y = 85 \\ y = 85 - 35 \\ y = 50](https://tex.z-dn.net/?f=5x%20%2B%201y%20%3D%2085%20%5C%5C%205%287%29%20%2B%20y%20%3D%2085%20%5C%5C%2035%20%2B%20y%20%3D%2085%20%5C%5C%20y%20%3D%2085%20-%2035%20%5C%5C%20y%20%3D%2050)
Answer:
x = 2 and y = 5
Step-by-step explanation:
Given
x = y - 3.....i)
2x + 3y = 19.........ii)
Putting x = y - 3 in equation II)
2( y - 3 ) + 3y = 19
2y - 6 + 3y = 19
5y = 19 + 6
5y = 25
y = 25 / 5
y = 5
Now putting y = 5 in equation i)
x = 5 - 3
x = 2
Hope it will help :)❤
X+y=0
They are both sloped at -x, but one passes through the point (-1,-1) and the other doesn't.