# 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 194145: The perimeter of a rectangle is six times the width. If the length were increased by 4 inches and the width were increased by 7 inches, then the perimeter would be 160 inches. What is the width? P = 2l + 2w 160 = (2l + 4) +(2w +7) When I substitute, it is just a mess. Click here to see answer by jim_thompson5910(28595)

 Question 194146: Neil is 4 years older than Andrea. If Neil was twice as old as Andrea four years ago. How old was Andrea Click here to see answer by jim_thompson5910(28595)

 Question 194298: What is the solution to the system of equations? 3x+5y=16 6x-2y=-4 Is it (1/3,3)? Click here to see answer by Alan3354(30993)

 Question 194296: Can someone help me please? I am having a problem solving this. Thank-you, much. x+5y=3 (1) x=5-5y (2) Click here to see answer by Earlsdon(6287)
 Question 194296: Can someone help me please? I am having a problem solving this. Thank-you, much. x+5y=3 (1) x=5-5y (2) Click here to see answer by edjones(7569)

 Question 194532: I was trying the tutorial and made it to the point where it says just type in the equation to solve it and it just wont solve this is not for school just trying to learn how much solid wrap and printed wrap was sold what i got was 4.00x + 6.00y = 2340 x + y = 480 Click here to see answer by Alan3354(30993)
 Question 194532: I was trying the tutorial and made it to the point where it says just type in the equation to solve it and it just wont solve this is not for school just trying to learn how much solid wrap and printed wrap was sold what i got was 4.00x + 6.00y = 2340 x + y = 480 Click here to see answer by ankor@dixie-net.com(15652)

 Question 194958: how do you solve this substitution x+2y=2 5x -3y=-29 Click here to see answer by checkley77(12569)

 Question 195945: Find all the solutions of the following systems of equations if possible. If a system has no solution, explain why it does not. (a) 3X – Y = 3 (b) 2X – Y = 1 (c) 2X – Y = 1 3X +Y = 15 2Y – 4X = 3 2Y – 4X = (-2) Click here to see answer by jim_thompson5910(28595)

 Question 196059: I am trying to help my son with Graphing Linear equations. It has been about 20 years since I have done this. Could you explain how to do this one problem to me and so I can help him understand what to do? y=2x+0 slope= y-intercept solution= ( , ) Click here to see answer by Alan3354(30993)

 Question 196173: Certain number of students planed to go for a picnic. Tht total expense was estimated to be Rs.3600-. But 15 students could not go. Each student participated had to pay Rs.8/- more. Then howmany students participated in the picnic Click here to see answer by josmiceli(9678)

 Question 196595: Solve this system using the Substitution Method: x + y = 7/2 4x - 3y = -14 Click here to see answer by jim_thompson5910(28595)

 Question 196603: Donna invested her \$33,000 bonus and received a total of \$970.00 in interest after one year. If part of the money returned 4% and the remainder 2.25% then how much did she invest at each rate? Click here to see answer by checkley77(12569)

 Question 196630: How can you solve the following system of euqations for x? 2x+y=7 x-y=2 Click here to see answer by jim_thompson5910(28595)

 Question 196972: A group of 52 people attended a ball game. There were three times as many children as adults in the group. Set up a system of equations that represents the numbers of adults and children who attended the game ans solve the system to find the number of children who were in the group. Click here to see answer by Mathtut(3670)

 Question 197117: Solve the following system of equations algebraically: x^2+y^2=100 y=x-2 Click here to see answer by ankor@dixie-net.com(15652)

 Question 197168: When using the subtitution maethod: 3x+y=7 2x-5y= -1 7-3x=y so, 2x- (7-3x)= -1 now I get lost... do I... Divide both sides by 2? 2x- (7-3x)= -1 x- (7-3x)= -1/2 ??? Subtract? Click here to see answer by jim_thompson5910(28595)

 Question 191178: who created the concept of using algebraic methods to solve linear systemsby using elimination?? Click here to see answer by solver91311(16885)

 Question 197355: Solve the system of equations by graphing. 7x-9y=-18 9y-7x=18 Is the system consistent or inconsistent? Click here to see answer by jim_thompson5910(28595)

 Question 197356: Solve the following system of equations. X+9y=5 (1) X=4-9y (2) What is the solution of the system? Click here to see answer by jim_thompson5910(28595)

 Question 197443: Hi! I am having trouble putting the following equation into proper form. My assignment was to create two equations that would fit the intergers 4,9. I chose for my first equation: 2x+3y=35. The other equation and the one I am having trouble with is 52=4x-4y. I thought when I put the second equation into the form ax+by=c my answer would be 4x+4y=52. I am wrong. Can you please help me? Thank you in advance. Lynne Click here to see answer by jim_thompson5910(28595)

 Question 197921: 2x + 3y = 8 and 3x + 2y = 7 Click here to see answer by Ratman99(5)
 Question 197921: 2x + 3y = 8 and 3x + 2y = 7 Click here to see answer by jim_thompson5910(28595)

 Question 197997: A first number plus twice a second number is 5. Twice the first number plus the second totals 4. Find the numbers. Click here to see answer by jim_thompson5910(28595)

 Question 198064: In a triangle, the sum of the interior angles is 180 degrees. If angla A is three times as large as angle B, and angles B and C sum to 90 degrees, what is the measure of each angle? Click here to see answer by solver91311(16885)

 Question 198080: I really have been confused for a while on this question and can't seem to figure it out. Find the solution of the system of equations by graphing. -5x + y = -5 -4x+ 2y = 2 I tried to graph it and I got the point (2,6). I don't know if I did it right or wrong but I need help thank you. Click here to see answer by stanbon(57347)
 Question 198080: I really have been confused for a while on this question and can't seem to figure it out. Find the solution of the system of equations by graphing. -5x + y = -5 -4x+ 2y = 2 I tried to graph it and I got the point (2,6). I don't know if I did it right or wrong but I need help thank you. Click here to see answer by jim_thompson5910(28595)

 Question 198092: How do I solve -5/3v+4/3=4/7-5/7 ? And can you explain it? thank you Click here to see answer by stanbon(57347)

 Question 198141: 7. Consider again the car described in Exercise 6. On about what percentage of the trips will your gas mileage be above 43 miles per gallon? Click here to see answer by Edwin McCravy(8909)

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