All categories

4 years ago

Use the Elimination method to solve the system of equations. X+y=-3 X-y=13

Mathematics

2 answers:

pashok25 [27]4 years ago

8 0

For x
x+y=-3
x-y=13
---------
2x=10
x=5
For y
5+y=-3
y=-3-5
y=-8

svlad2 [7]4 years ago

3 0

X + y = -3
x - y = 13
 2x = 10
 2 2
 x = 5
x + y = -3
5 + y = -3
- 5 - 5
 y = -8
(x, y) = (5, -8)

You might be interested in

the student to teacher ratio is 15:3. if there are 90 teachers at the school, how many students are there

mixas84 [53]

$15x+3x=90\\
18x=90\\
x=5\\\\
15x=15\cdot5=\boxed{75}$

8 0

4 years ago

Read 2 more answers

Solve the equation 3x-4=8-x

solmaris [256]

Answer:

x=3

Step-by-step explanation:

3x-4=8-x(Group like terms)

3x+x=8+4(Add both sides)

4x=12(After adding you will proceed to divide both sides by 4)

x=3(x is 3 because 4 can divide 12 3 times that's why we have x as equal to 3)

5 0

3 years ago

Using a graph, table of values, and/or equations solve the following problem.

olchik [2.2K]

Answer:

n = 11/3

Step-by-step explanation:

n = certain number

6n - 1 = 21

6n = 22

n = 22/6 or 11/3

3 0

3 years ago

3x +15 = 2x + 10 + x + 5

Shkiper50 [21]

Answer:

The equation is true.

Step-by-step explanation:

Simplify. Combine like terms:

3x + 15 = (2x + x) + (10 + 5)

3x + 15 = (3x) + 15

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Subtract 3x and 15 from both sides:

3x (-3x) + 15 (-15) = 3x (-3x) + 15 (-15)

3x - 3x = 15 - 15

0 = 0

~ True. The two expressions are equal to each other.

4 0

3 years ago

Read 2 more answers

Mr. Carter is making a dessert using 9/10 pound of peach and 5/10 pound of raspberries. How much more peaches than raspberries i

-Dominant- [34]

Answer: 4/10
Explanation: 9/10 - 5/10 = 4/10
The denominator is already both 10 so u can subtract the numerator without worry

8 0

3 years ago