1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
antiseptic1488 [7]
3 years ago
12

What is the value of x in the solution to the following system of linear equations

Mathematics
2 answers:
DiKsa [7]3 years ago
8 0

Since the equations are equal to each other, let's set them up.

x-1=2x+1; let's add 1 to both sides.

x=2x+2; let's subtract 2x from both sides.

-x=2; we need x to be positive so let's divide it by -1.

x=-2

Let's see what y is and see if x is -2.

y=-2-1=-3

y=-2(-2)+1=-4+1=-3


So, x=-2 and y=-3.

Marina CMI [18]3 years ago
4 0

\left\{\begin{array}{ccc}y=x-1\\y=2x+1\end{array}\right\Rightarrow 2x+1=x-1\\\\2x+1=x-1\ \ \ \ |-1\\2x=x-2\ \ \ |-x\\x=-2\\\\\text{substitute the value of x to the first equation}\\\\y=-2-1\\y=-3\\\\\text{Answer:}\ \boxed{x=-2;\ y=-3}

You might be interested in
What is 8c + 10b ÷ 7a if c = 7, b = 12, and a = 5 Please give a full and good explanation for a brainliest...​
PolarNik [594]

Answer:

141  5/7

Step-by-step explanation:

8c + 10b ÷ 7a

Let c = 7, b = 12, and a = 5

8*7 + 10*12 ÷ 7*5

Multiply and divide from left to right

56+120 ÷7*5

56+ 600/7

Get a common denominator

392/7 + 600/7

992/7

Change from an improper fraction to a mixed number

141  5/7

8 0
3 years ago
Read 2 more answers
Solve for x.<br><br> -98=4x-50
alexdok [17]
The answer to your question is x= -12 hope this helps ! Makes sure you put the negative !
3 0
3 years ago
The measures of 6 of the interior angles of a heptagon are: 120°, 150°, 135°, 170°, 90°, and 125°. What is the measure of the la
Lilit [14]
1. consider one angle of a (convex) heptagon. From that angle you can construct 7-3=4 diagonals. (-3 because we cannot create diagonals with the adjacent vertices and the angle itself )

2. 4 diagonals create 5 triangular regions. (check the picture)

3. So the sum of the measures of the interior angles of the heptagon is 180°*5=900°.

4. The measure of the remaining 7th interior angle is 900°-(120+150+135+170+90+125)°=110°.

5. The largest exterior angle is when the interior angle is the smallest.

6. The smallest interior angle is 90°, so the largest exterior angle is 180°-90°=90°


Answer: 90°

7 0
3 years ago
What is the difference in the Volume Formula for a prism and a pyramid. *
Tanzania [10]

Answer:the volume of a prism is the area of the base times the height of the prism. The volume of the pyramid has the same base area and height as the prism, but with less volume than the prism. The volume of the pyramid is one third the volume of the prism.

Step-by-step explanation:

i hope this helps

4 0
3 years ago
How can you simplify this on to an expression
LiRa [457]
Hello : 
1/(√6 -1) = (√6 +1)/(√6 -1)(√6 +1) =  (√6 +1)/(√6)²-1² ) = (√6 +1)/5
4 0
3 years ago
Other questions:
  • Can anyone tell the answer
    12·1 answer
  • I need help on number 29
    10·2 answers
  • the ratio of white pens to green pens is 2 to 8. how many green pens are there if there are 18 white pens?
    15·1 answer
  • I’m not tryna fail lolll help
    13·1 answer
  • Find the equation of the line that Contains the point (4,-2) and is perpendicular to the line y = -2x+5
    13·1 answer
  • Five kittens are sharing 6 cups of milk equally how much milk does each kitten get
    9·2 answers
  • Factor the expression using the GCF. 24y+88x =
    14·1 answer
  • If the dimensions of a pentagonal prism are quadrupled, then the surface area of the prism is multiplied by eight.
    5·1 answer
  • Please help, and please explain how you got the answer
    11·1 answer
  • A fireperson needs to use a ladder of 25 feet in length to rescue a cat that has become
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!