How to solve this?:
2x+2y=9
2x-y=3
2 answers:
Answer:
(2.5, 2 )
Step-by-step explanation:
Given the 2 equations
2x + 2y = 9 → (1)
2x - y = 3 → (2)
Rearrange (2) expressing y in terms of x
y = 2x - 3 → (3)
Substitute y = 2x - 3 into (1)
2x + 2(2x - 3) = 9 ← distribute left side and simplify
2x + 4x - 6 = 9
6x - 6 = 9 ( add 6 to both sides )
6x = 15 ( divide both sides by 6 )
x = 2.5
Substitute x = 2.5 into (3) for corresponding value of y
y = 2(2.5) - 3 = 5 - 3 = 2
Solution is (2.5, 2 )
Solve this using the elimination process.
They're already lined up so just solve!
2x + 2x = 4x
2y+ (-y) = 3y
9 + 3 = 12
4x + (-1y) = 12
Now solve.
4x + -1 x y = 12
4x - y = 12
4x = 12 + y
x = 12 + y / 4
First, when a problem is lined up with the same vales/terms, you can use the elimination process while doing math.
Then, make your equation by adding and subtracting the same terms.
Therefore, you finally get your answer.
Keep in mind not all answers will be a full number.
You might be interested in
Answer:
A
Step-by-step explanation:
Here as we can see that minimum drink a person can drink is 0 and is
(3.5-0)/2 =1.75 std deviation away from mean
which reflects that distribution;s right tail is more extended
therefore option A is correct: Distribution is right skewed
Uranus = 530.4
Neptune = 509.6
Saturn = 126
Do parenthesis first (4)
Then, do the division 8/2 = 4
Then multiply 4 and 4 which will be 16
Add 6 to 16 and you get 22
Answer:
1⅓ inches
Step-by-step explanation:
Area = side² = x²
9(x²) = 16
x² = 16/9
x = 4/3 inches or 1⅓ inches
It is subtracting the current number by 1/2 OR you can divide by 2. each time.
32 / 2= 16
16 / 2=8
8/2=4
4/2=2
2/2=1
Hope this helped!
