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
bija089 [108]
3 years ago
7

7x-y=19 2x-3y=19 solve by elimination​

Mathematics
1 answer:
avanturin [10]3 years ago
8 0

Answer:

x=2 y=-5

Step-by-step explanation:

7x-y=19

2x-3y=19

Multiply the first equation by -3

-3(7x-y)=19*-3

-21x +3y =-57

Add this to the second equation to eliminate y

-21x +3y =-57

2x-3y=19

-----------------------

-19x = -38

Divide by -19

-19x/-19 = -38/-19

x = 2

Now we need to find y

7x-y = 19

7(2) -y =19

14 -y =19

Subtract 14 from each side

14-14 -y=19-14

-y=5

Multiply by -1

y = -5

You might be interested in
Solve the equation, keeping the value for x as an improper fraction. 23x = − 12x + 5 1.Isolate the variable by adding 12x to bot
kogti [31]

Answer:

x=\frac{30}{7}

Step-by-step explanation:

We have been given an equation \frac{2}{3}x=-\frac{1}{2}x+5. We are asked to solve our given equation.

First of all, we will add \frac{1}{2}x on both sides of equation to separate x variable on one side of equation.

\frac{2}{3}x+\frac{1}{2}x=-\frac{1}{2}x+\frac{1}{2}x+5

\frac{2}{3}x+\frac{1}{2}x=5

Now, we will make a common denominator.

\frac{2*2}{3*2}x+\frac{1*3}{2*3}x=5

\frac{4}{6}x+\frac{3}{6}x=5

Add numerators:

\frac{4+3}{6}x=5

\frac{7}{6}x=5

Upon multiply both sides of our equation by \frac{6}{7}, we will get:

\frac{6}{7}*\frac{7}{6}x=5*\frac{6}{7}

x=\frac{5*6}{7}

x=\frac{30}{7}

Therefore, the solution for our given equation is x=\frac{30}{7}.

5 0
3 years ago
Read 2 more answers
The value of the expression 4 square root of 81^3 is ______.
Paladinen [302]

Answer:

If its written as the fourth root of (81^3) the answer is 27.

6 0
3 years ago
Read 2 more answers
What is the equation of the function that is graphed as line b?
Juli2301 [7.4K]

Following the slope of the line at x= 0 the line is at y =1 , at x=, it is at Y = 1.5, so the slope is 1/2

The y intercept is where the line crosses the y a is at x =0 which is 1

The equation would be y = 1/2x+ 1

5 0
3 years ago
WHAT IS HELP PLEASE <br><br> 6x2 -2x3 +x4 =?<br> DONT ANSWER TO GET QUICK POINTS
blondinia [14]

Answer:

i told you in the comment it equals 7

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Mrs. Ramiriz is making pies to sell at the local farmer’s market. It costs her $5 to make each pie, plus a one-time cost of $30
grin007 [14]
To answer the problem above, we must first define the word break even. Break even means there is no gain or loss, the difference between the capital amount and the sale amount is zero. In equation, let x be the number of pies. 5x + 30 = 12x, $5 times the number of pies plus $30 is equal to $12 times the number of pies sold. The answer is letter C.
5 0
3 years ago
Read 2 more answers
Other questions:
  • If (0.2)x = 2 and log 2 = 0.3010, then the value of x to the nearest tenth is:
    11·1 answer
  • If one side of a square measures 6 units,<br> what is its area?
    11·2 answers
  • Javed downloaded from the Internet two files that had a combined size of 696 megabytes. The size of the first file was 290 megab
    9·2 answers
  • The histogram below shows the number of sit-ups accomplished by 6th grade students in a physical fitness test.how many students
    13·1 answer
  • Tommy is purchasing items from an online store. The store charges $6 shipping and handling for each package. Write an expression
    10·1 answer
  • A toy store has a display showcasing models of local buildings. One model is shown below. Find the volume
    5·1 answer
  • PLEASE I NEED HELP AGAIN ATTACHMENT BELOW
    10·1 answer
  • What is the value of y?.
    8·2 answers
  • Which of the following angle measurements would you find in an equilateral triangle?
    15·1 answer
  • Can you please help me with this last question? I'm stuck​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!