# Questions on Algebra: Systems of Linear Equations answered by real tutors!

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 Linear Solvers Practice Answers archive Word Problems Lessons In depth

 Question 152717: MY LAST MODULE QUESTION!!! YAYA! but i cant figues it out .... Help please?? q: A concert promoter set the following ticket prices: \$8 for adults, \$5 for students. There were 1800 tickets sold for a total of \$12 750. a. Write a system of equations in two variables to model the situation. b. solve the system of equations. c.indicate the number of adult tickets and student tickets sold. d. check that your answer fits the equation. Click here to see answer by Fombitz(13828)
 Question 152717: MY LAST MODULE QUESTION!!! YAYA! but i cant figues it out .... Help please?? q: A concert promoter set the following ticket prices: \$8 for adults, \$5 for students. There were 1800 tickets sold for a total of \$12 750. a. Write a system of equations in two variables to model the situation. b. solve the system of equations. c.indicate the number of adult tickets and student tickets sold. d. check that your answer fits the equation. Click here to see answer by jim_thompson5910(28696)

 Question 152782: i need help solving linear equations i dont remember how to exactly. help!!! 2x-2(2-x)=40 2(2x+4)=-3(2x+1) 12-(3x-2)=2(x-1)+3x -3(x-2)=5(2x-12) Click here to see answer by oscargut(900)

 Question 152834: Paint Town sold 45 paintbrushes, one kind at \$8.50 each and another at \$9.75 each. In all, \$398.75 was taken in for the brushes. How many of each kind were sold? Click here to see answer by Fombitz(13828)

 Question 153025: Fundraising. The St. Mark’s Community Barbecue served 250 dinners. A child’s plate cost \$3.50 and an adult’s plate cost \$7.00. A total of \$1347.50 was collected. How many of each type of plate was served? Click here to see answer by jojo14344(1512)

 Question 153024: Fundraising. The St. Mark’s Community Barbecue served 250 dinners. A child’s plate cost \$3.50 and an adult’s plate cost \$7.00. A total of \$1347.50 was collected. How many of each type of plate was served? Click here to see answer by orca(409)

 Question 153023: Example to solve: Mixing Cleaning Solutions King’s Service Station uses two kinds of cleaning solution containing acid and water. “Attack” is 2% acid and “Blast” is 6% acid. They want to mix the two to get 60qt of a solution that is 5% acid. How many quarts of each should they use? Click here to see answer by ankor@dixie-net.com(15745)

 Question 153084: For a school play, 340 tickets with a total value of \$810 were sold. Some tickets cost \$2 and some cost \$3. How many of each type were sold? Click here to see answer by jim_thompson5910(28696)

 Question 153187: Solve by substitution or elimination method: 1. 3x - 2y = 8 -12x + 88 = 32 2. 7x - 5y = 14 -4x + y = 27 3. -4x + 3y = 5 12x - 9y = -15 Click here to see answer by jim_thompson5910(28696)

 Question 153208: how do you solve y= 1/3x - 3 and y= -2x + 4 algebraically? this is the question; Solve the above system of equations algebraically, use the elimination or substitution method. PLEASE HELP!!!! Click here to see answer by jim_thompson5910(28696)

 Question 153240: you have used all of a \$50 gift certificate watching movies at the local theater. Afternoon movies are \$4 and evening movies are \$6. you have watched a total of 10 movies. HOw much have you spent on evening movies? Click here to see answer by jim_thompson5910(28696)

 Question 153352: Can I please get some help solving these Solve by substitution or elimination method: -4x + 3y = 5 12x - 9y = -15 Click here to see answer by jim_thompson5910(28696)

 Question 153486: Find the equation of the line passing through the points ( - 4, 8) and (5, -1). Also find the equation of the straight line perpendicular to the line you find above and passing through the point ( -3, -8). Click here to see answer by checkley77(12569)

 Question 153663: A hospital staff mixed 70% disinfectant solution with a 30% disinfectant solution. How many liters of each were used to make a 30L of a 45% disinfectant : Let x = amt of 70% disinfectant : the resulting amt is to be 30L, therefore: (30-x) = 30% stuff Click here to see answer by ankor@dixie-net.com(15745)

 Question 153844: what is the slope and y-intercept of the equation 5x-2=0? Click here to see answer by jim_thompson5910(28696)

 Question 23176: I can't figure out these problems i keep getting different answers everytime i solve them. Identify the type of system of equations for the system below: 2y=4-6x 3y+9x=6 Identify the system of equations which has no solution. a. 5x+2y=4 2x-2y=10 b. -x=3y+1 x=3y-1 c. x-2y=-6 2x=4y-12 d. x=2y-1 2x=4y Click here to see answer by acacia<3(1)

 Question 153912: Find the equation of the line, write your answer in slope intercept. The line goes (1,4) and is parellel to x-2y=6 I have come up with the slope, I believe it is (1/2, -3)Is this correct? Click here to see answer by checkley77(12569)

 Question 154164: Hello, I need to find the volume of the cube, in cubic inches for: 2x^2/z The 2X^2 is over z Thanks! Click here to see answer by Alan3354(31487)

 Question 154191: Five years ago a man was seven times as old as his son. Five years hence, the father will be three times as old as his son. Find their present ages. Click here to see answer by josmiceli(9817)

 Question 154238: A. Find the equation of the line passing through the points (3, -5) and ( 1, -2). B. Find the equation of the line perpendicular to the line you found above and passing throught the point ( -1, - 2) Click here to see answer by josmiceli(9817)

 Question 154278: I am studying the cliffsnotes algebra 1 book. My problem is solving equations with two variables. The example problem in the book is 3x+3y=24 and 2x+y=13. The example in the book starts the problem out by multiplying the 2x+y=13 by 3. I wanted to know why 3. The example wants the x and y solved for both equations. The book explains to subtract the equations. I would appreciate any help. Click here to see answer by jim_thompson5910(28696)

 Question 154343: Solve the system of equations using the addition (elimination) method. If the answer is a unique solution, present it as an ordered pair: (x, y). If not, specify whether the answer is “no solution” or “infinitely many solutions.” x + 2y = 5 3x + 4y = 1 Click here to see answer by jim_thompson5910(28696)

 Question 154342: Solve the system of equations using the addition (elimination) method. If the answer is a unique solution, present it as an ordered pair: (x, y). If not, specify whether the answer is “no solution” or “infinitely many solutions.” x + 2y = 5 3x + 4y = 1 Click here to see answer by jim_thompson5910(28696)

 Question 154341: Solve the system of equations using the addition (elimination) method. If the answer is a unique solution, present it as an ordered pair: (x, y). If not, specify whether the answer is “no solution” or “infinitely many solutions.” x + 2y = 5 3x + 4y = 1 Click here to see answer by jim_thompson5910(28696)

 Question 154375: Hello, I have a question about a part of a linear equation. The question is: 5-(8+3x)=2x+3 I am very confused on how to solve the 5-(8+3x). Thank you for helping me! Click here to see answer by jim_thompson5910(28696)

 Question 154395: I am trying to solve for x on this problem, except I keep getting stuck and can not seem to get this correct. the problem is: 2 - (5/3)x = 3x + (3/2), please let me know how you arrive at a solution if you would. Thank you Dave Click here to see answer by Alan3354(31487)

 Question 154416: 2x+y=4 x+y+2 im stuck i need help solving this can you give me some help Click here to see answer by jim_thompson5910(28696)

 Question 154804: Solve each of the following systems by the elimination method 1/4x - 1/6y = -2 -1/6x + 1/5y = 4 Click here to see answer by orca(409)

 Question 154933: How do you figure this out when y is isolated on both equations: y=3x+1 y=6x-1 Thank you Click here to see answer by scott8148(6628)
 Question 154933: How do you figure this out when y is isolated on both equations: y=3x+1 y=6x-1 Thank you Click here to see answer by stanbon(57940)
 Question 154933: How do you figure this out when y is isolated on both equations: y=3x+1 y=6x-1 Thank you Click here to see answer by orca(409)

 Question 155058: Joe has a collection of nickels and dimes that is worth \$5.65. If the number of dimes were doubled and the number of nickels were increased by 8, the value of the coins would be \$10.45. How many dimes does he have? Click here to see answer by jim_thompson5910(28696)

 Question 155059: An express and local train leave Gray’s Lake at 3 P.M. and head for Chicago 50 miles away. The express travels twice as fast as the local, and arrives 1 hour ahead of it. Find the speed of each train. Click here to see answer by jim_thompson5910(28696)

 Question 155060: Walt made an extra \$9000 last year from a part-time job. He invested part of the money at 9% and the rest at 8%. He made a total of \$770 in interest. How much was invested at 8%? Click here to see answer by jim_thompson5910(28696)

 Question 155090: Why is x = 4 a vertical line Click here to see answer by stanbon(57940)