X - number of apple pies
(7-x) - number of peach pies
6x- pieces of an apple pie
7(7-x) - pieces of peach pie
6x+7(7-x)= 44
6x+49-7x=44
-x=-5
x=5
7-x=7-5=2
Answer: 5 apple pies and 2 peach pies.
X + y = 7
xy = -30
x + y = 7
x - x + y = -x + 7
y = -x + 7
xy = -30
x(-x + 7) = -30
x(-x) + x(7) = 30
-x² + 7x = -30
-x² + 7x + 30 = 0
-1(x²) - 1(-7x) - 1(-30) = 0
-1(x² - 7x - 30) = 0
-1 -1
x² - 7x - 30 = 0
x² - 10x + 3x - 30 = 0
x(x) - x(10) + 3(x) - 3(10) = 0
x(x - 10) + 3(x - 10) = 0
(x + 3)(x - 10) = 0
x + 3 = 0 or x - 10 = 0
- 3 - 3 + 10 + 10
x = -3 or x = 10
x + y = 7 or x + y = 7
-3 + y = 7 or 10 + y = 7
+ 3 + 3 - 10 - 10
y = 10 or y = -3
(x, y) = (-3, 10) or (x, y) = (10, -3)
The two numbers that add up to 7 and multiply to 30 are -3 and 10.
Answer:
x=3
Step-by-step explanation:
both of the two sides equal the same so it would be 3x=9x-18
solve you get x=3
Answer: 1E - 9
Step-by-step explanation:
Answer: They collected 13,204 cans more than needed.