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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 567960: Can you do this for me please
5[2-3(6x-1)]
Im not sure how you do this
Click here to see answer by Theo(3504)

Question 567964: x+y=7
x-y=3
Click here to see answer by jim_thompson5910(28715)

Question 568268: how do you make a system of equations out of a word problem?
Click here to see answer by mananth(12270)

Question 568510: What the x and the y in substitution system of equations. 3x+y=9 y=-5x+9 show details please.
Click here to see answer by jim_thompson5910(28715)

Question 568517: Please help me solve this equation:
3x-2y=5
x=y+10
Click here to see answer by jim_thompson5910(28715)

Question 568518: 2x+3y=4
x+y=3
Click here to see answer by themathtutor127(44)

Question 567293: What is 5*1/5?
Click here to see answer by jim_thompson5910(28715)

Question 568396: What is the Solution to the system?

2x - 3y = -27
-3x + 2y = 23
[ I got -3 for my answer]
Click here to see answer by jim_thompson5910(28715)

Question 568737: 4x + 7y = 8.77
8x + 14y = 15.8
I ued substitution and got x=1.2175 and y=39 over 70. Obviously I did something wrong.
Click here to see answer by mananth(12270)

Question 568770: How do I solve:
y=x^3-2x^2+x-1
y=-x^2+3x-1
I substituted y=-x^2+3x-1 -x^2+3x-1=x^3-2x^2+x-1
0=x^3-x^2-2x
Not sure what to do next
Click here to see answer by josmiceli(9817)

Question 568670: How do you tell on a coordinate graph if it is a function or not????

Click here to see answer by richard1234(5390)

Question 568888: 13x+7y=88
x+8y=-38
Solve this problem using the Solution method
Click here to see answer by mananth(12270)

Question 568731: what is x and y for this problem, whats the solution
4x+5y=48
y=3x+2
Click here to see answer by 10301650(32)

Question 569135: Which is the solution to the system?

x+5y = -15
y = 1/5x + 1

Below is how I solved it:
x+5(1/5x+1)=-15
x+(x+5)=-15
x^2+5=-15
x^2+5-5=-15-5
x^2=-20

Is this correct ?

Click here to see answer by Alan3354(31532)

Question 569202: What are the solutions to the equation below:
|2x+3|-5=12
I have chosen x=-5 or x=7
Click here to see answer by Alan3354(31532)

Question 569457: what's
4x+3y=10
y=2x
in sustitution method??
plz answer asap!!1
thnxx
Click here to see answer by josmiceli(9817)

Question 569598: how many solutions does this system of equations have???
2x+3y=6
y=-2/3x-1
it woudd be amazing if you could answer soon!
Click here to see answer by Alan3354(31532)

Question 569598: how many solutions does this system of equations have???
2x+3y=6
y=-2/3x-1
it woudd be amazing if you could answer soon!
Click here to see answer by TutorDelphia(193)

Question 569698: 28:39 What is the x-coordinate of this solution?
2x+3y=-27
-3x+2y=23
My Work is Shown Below:
3(2x-3y=-27)
-3+2y=23
__________
6x-9y=81
-3x+2y=23
_________
-18x-7y=104
+18 +18
-7y=122
__ ___
-7 -7
y= -17.42
________________________________________________________________________________
Is that correct?
Click here to see answer by Alan3354(31532)

Question 569696: 28:39 What is the x-coordinate of this solution?
2x+3y=-27
-3x+2y=23
My Work is Shown Below:
3(2x-3y=-27)
-3+2y=23
__________
6x-9y=81
-3x+2y=23
_________
-18x-7y=104
+18 +18
-7y=122
__ ___
-7 -7
y= -17.42
________________________________________________________________________________
Is that correct?
Click here to see answer by JBarnum(2044)

Question 569855: At a circus, 135 clowns are getting into cars. Blue cars hold 20 clowns and red cars only hold 15. How many of each are there?
Click here to see answer by stanbon(57967)

Question 569921: total of tickets were sold for the school play. They were either adult tickets or student tickets. The number of student tickets sold was three times the number of adult tickets sold . How many adult tickets were sold?
Click here to see answer by mananth(12270)

Question 570017: 0.5x+y=9
1.6x+0.2y=13
Can you show me the steps to solve this using elimination?
Click here to see answer by Alan3354(31532)

Question 569992: List all possible pairs of integers x and y such that the product of x and y equals the sum of x and y.
Click here to see answer by ankor@dixie-net.com(15746)

Question 570138: x+y=9
y=2x
Click here to see answer by Maths68(1474)

Question 570138: x+y=9
y=2x
Click here to see answer by sahnikdgp(1)

Question 570841: What is the x-coordinate of this solution?
2x+3y=-27
-3x+2y=23
My Work is Shown Below:
3(2x-3y=-27)
-3+2y=23
__________
6x-9y=81
-3x+2y=23
_________
-18x-7y=104
+18 +18
-7y=122
__ ___
-7 -7
y= -17.42
________________________________________________________________________________
Is that correct?
Click here to see answer by JBarnum(2044)

Question 571830: How can you use y=43+5x to solve 78=43+5x?
Click here to see answer by unlockmath(1614)

Question 572056: Find the equation of the line in standard form that passes through (-7,5) and is perpendicular to -4x+3y=13.
So far I have:
-4x+4x+3y=4x+13
3y/3=4x/3+13/3
y=4/3x+13/3.
Am I right at all? And if so, where do I go from here?
Click here to see answer by Theo(3504)

Question 572081: Using the equation -3x-y=6, find the slope of the line, the x-intercept of the line and the y-intercept of the line
Click here to see answer by nyc_function(2733)

Question 572586: solve by substitution method
5x+2y=-7
7x+3y=13
I am having an extremly hard time figuring this out PLEASE help
Click here to see answer by Alan3354(31532)

Question 572618: so im having problems in my algebra class, how would i do an equation like this ->
Choose the correct first step(s) to solve the system using elimination.
4x + 7y = 6 and 6x + y = 2
(example problem)
1)7(6x + y = 2) → -42x - 7y = -14
2)4x + 7y = 6x + y
3)y = -6x + 20 → 4x + 7(-6x + 20) = 6
4)(4x + 7y) + (6x + y) = 8
5)(4x + 7y) - (6x + y) = 4

Click here to see answer by scott8148(6628)

Question 572952: I am so confused on how your supposed to do this type of substitution problem.
y=-2x+6
3y-x+3=0
Click here to see answer by mathsmiles(68)

Question 572581: solve by the substitution method
4x-4y=0
7x+54=y
Click here to see answer by mathsmiles(68)

Question 572964: I am confused on how you go about solving this substitution problem
4y+3=3y+x
2x+4y=18
I started to try doing this problem several different ways but I'm not sure how to solve it. Here's how I attempted to do it.
4y+3=3y+x I started by subtracting ( swinging )
-4y -x -4y -x
= x-2=-1y
+2 +2
-1/2x -1=y
2x+4=18
2x+4( -1/2x-1)=18
2x+ -2x -4=18
0x-4=18
+4 +4
0x=22
Divide by 0 on each side.
X=0
-1/2(0)-1
(0,1)
Click here to see answer by mathsmiles(68)

Question 572584: I cannot get this please help
solve using the substitution method
4m+n=27
m-3n=23
Click here to see answer by mathsmiles(68)

Question 572454: 2x-8y=7
5x+4y=5
Click here to see answer by mathsmiles(68)

Question 572588: solve by elimination
6x-9y=13.5
7y-3x=-8
Click here to see answer by mathsmiles(68)

Question 572164: How do you solve this system by using the elimination method?
{2x-y=20
{3x+2y=-19
Click here to see answer by mathsmiles(68)

Question 572390: The graph of the system
y=2x+2
6x-3y=-6
consists of two lines that:
a. intersect at one point
b. do not intersect
c. are not in the same place
d. intersect in an infinite number of points
Click here to see answer by KMST(1936)

Question 573075: I tried doing this equations to solve for y and x.
3x - 10y = -25
5x - 20y = -55
Could you help me???

Click here to see answer by Alan3354(31532)

Question 573145: (5,1)is a solution to the equation 2x - 3y = 7. What does this mean?
Click here to see answer by solver91311(17077)

Question 573145: (5,1)is a solution to the equation 2x - 3y = 7. What does this mean?
Click here to see answer by mathsmiles(68)

Question 573065: Timmy has 14 math and science books. He has 5 times more math books than science books. Write a system of equations representing how many math and science books Timmy has.
Click here to see answer by mathsmiles(68)

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