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

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Question 744909: Solve the following system of linear equations using either the substitution method or the addition method:
1. 2x+y=5
2. 4x+3y=14
Please help and show me the steps so I can learn. Thank you.
Click here to see answer by rothauserc(4718)

Question 745204: Please help me solve this equation:
1/2x+3y=5/6
1/3x-5y=16/9
Click here to see answer by rothauserc(4718)

Question 745343: x= adult tickets y= children tickets
5x + 3y = 134
x + y = 32
whats true about this equation?
a.) More adults attended the reunion than children
b.) six more children attended that adults
c.) nineteen children attended the reunion
d.) three more adults attended than children
i didnt know how i would solve this?
Click here to see answer by mananth(16946)

Question 745505: Please solve this system completely and show all work. Solve for x, y, and z.
x + 2y + z = 7
3x - y + z = -12
4x + 3y -2z = 9
Click here to see answer by sachi(548)

Question 745912: Sove graphicallt the system of Linear Equations: x+3y=11,3x+2y=12

Click here to see answer by stanbon(75887)

Question 746901: how do you work it all out? how do you do the steps? how to solve it?
Click here to see answer by Alan3354(69443)

Question 746857: Find the solution to the system of equations given below by using linear combination:
8x + 4y = 48
4x � 2y = 40
A. (8, -4)
B.(11, 2)
C.(-8, 24)
D. (8, 4)

Click here to see answer by checkley79(3341)

Question 747255: Help me solve this equation please.
Simplify the expression. Assume that all variables represent nonzero numbers.
6p^3 times 3p^5 = __
Click here to see answer by josmiceli(19441)

Question 747258: Help me solve this equation please.
Simplify the expression
8x^3(3x^2+5y)=__ simplify your answer
Click here to see answer by Cromlix(4381)

Question 747298: Please help me solve this equation?
Multiply and write the answer without exponents. ( the x's are actually standing for multiplication instead of a dot.)
(2 x 10^6) x(3 x 10^4)
=__
Click here to see answer by josgarithmetic(39617)

Question 747296: Will you please help me solve this equation? :)
simplify.
(8y)^-2= __ ( Use positive exponents only.)
Click here to see answer by tommyt3rd(5050)

Question 747335: What is the main disadvantage to graphing a system of equations?
Click here to see answer by tommyt3rd(5050)

Question 747337: Solve by substitution.
3x-5y=4
y=4-2x
Click here to see answer by jim_thompson5910(35256)

Question 747338: Solve by substitution.
X+3Y=15
2x-3y=3
Click here to see answer by lynnlo(4176)

Question 747338: Solve by substitution.
X+3Y=15
2x-3y=3
Click here to see answer by timvanswearingen(106)

Question 747292: Please help me solve this equation?
A family refers to a group of two or more people related by birth, marriage, or adoption who reside together. In 2000, in Country A, the average family net worth was $240,000 and there were about 8.6 times 10^7 families. Calculate the total family net worth in Country A in 2000.
Country A's total family net worth is __ dollars
( use scientific notation. Use the multiplication symbol in the math palette as needed, Round to the nearest tenth as needed. )
Click here to see answer by rothauserc(4718)

Question 747617:
the length of a rectangle is twice its width if the length decreases by 6cm and the width increases by 5 cm the rectangle becomes a square find the area of the rectangle
Click here to see answer by checkley79(3341)

Question 748164: is 9x+3y=12; 27x+9y=40 parallel, perpendicular, or neither?
Click here to see answer by Cromlix(4381)

Question 748164: is 9x+3y=12; 27x+9y=40 parallel, perpendicular, or neither?
Click here to see answer by tommyt3rd(5050)

Question 748492: two sums of y=x
y=-3x-8
I know on a linear graph they meet at co-ordinates (-2,-2)
ive been asked to solve the two above sums usng eliminaton and subsitution method for simultanious linear equations I have spent all day trying to work it out ad just cant grasp it could you help please
Click here to see answer by nilan(17)

Question 748605: Solve the following system of equations.

5x - y = 7
2 + x = 7y
Click here to see answer by Cromlix(4381)

Question 748673: What is the equation of the line that passes through (5, -2) and (-3, 4)?
Click here to see answer by MathLover1(20850)

Question 749059: if a+a+a=15 and is smiplified as 3a.what would h+h+h+h be?
Click here to see answer by MathLover1(20850)

Question 749346: Solve 9x-3y=9, x+3y+11
Click here to see answer by tommyt3rd(5050)

Question 749517: How do you workout the problem x^2+9y^2=9
-2x+1y=-3 by elimination method
Click here to see answer by Alan3354(69443)

Question 749526: a rectangle has an area of 126 units ^2 and a perimeter of 46 units. Find the dimensions
Click here to see answer by Alan3354(69443)

Question 750045: If you rent a car for 4 days, your bill will be $44. If you rent the same car for 10 days, your bill will be $100. Write an equation for the cost of the rental.
Click here to see answer by tommyt3rd(5050)

Question 750104: The cost of 2 bagels and 2 cans of juice is $4.40. The cost of 3 bagels and 4 cans of juice is $7.80
a. write a system f equations to represent this situation.
b. Solve the system of equations by substitution. Explain what the solution means.
Click here to see answer by FrankM(1040)

Question 750119: Which of the coordinate pairs below is a solution to the following system of equations?
x2 + y2 = 18
5x + y = 17
Click here to see answer by Alan3354(69443)

Question 750317: 6X+8y=10
26x+48y=2
sir/mam, how to find the value of x and y....pls rply with full explaination..what isthe basic thing need to do for solving linear equation..pls rply.....am very poor in mathematics..
Click here to see answer by kibauu(44)

Question 750415: does 4x-3y=6 and 8x=6y+10 have one solution, no solution, or infinitley many solutions
Click here to see answer by Alan3354(69443)

Question 750418: does 3x+7y=8 and 21y=-9x+24 have one solution, no solution or infinitly many solutions

Click here to see answer by MathLover1(20850)

Question 750418: does 3x+7y=8 and 21y=-9x+24 have one solution, no solution or infinitly many solutions

Click here to see answer by tommyt3rd(5050)

Question 750732: how do I solve this equation?
-0.3(x-6)+ x = 0.5(3-x)
Click here to see answer by rfer(16322)

Question 750822: Solve the system of equations. Enter your answer as an ordered pair.
5x - y = 27
5x + 4y = 42
Answer:

Click here to see answer by stanbon(75887)

Question 750913: y=2x,y-2x=0

Click here to see answer by Alan3354(69443)

Question 750913: y=2x,y-2x=0

Click here to see answer by jim_thompson5910(35256)

Question 751585: 2l+2w=228 L=w+42 How do you find the length(L) and width(w)?

Click here to see answer by stanbon(75887)

Question 751585: 2l+2w=228 L=w+42 How do you find the length(L) and width(w)?

Click here to see answer by Cromlix(4381)

Question 751835: 5x-7y=11
3x=2y
Click here to see answer by malglu(63)

Question 741280: 6x=36-9y
-4x-9y=-30
Click here to see answer by tommyt3rd(5050)

Question 752609: A boat covers 30km upstream and 22 km downstrean in 8 hours. Also,it takes 4 more hours to travel 40 km upstream and 44 km downstrean. Find the speed of the boat in still water and that of the stream.
Click here to see answer by dkppathak(439)

Question 752587: 1/2x+1/3y=13
1/5x=1/8y=5
solve the system of equations using the elimination of addition method.
Identify whether the system is intersecting, parallel or coincident lines.
Click here to see answer by ankor@dixie-net.com(22740)

Question 752968: How do you solve this problem using the substitution method?
5x+4y=7
y=-3x
Click here to see answer by jim_thompson5910(35256)

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