Questions on Algebra: Expressions involving variables, substitution answered by real tutors!

Tutors Answer Your Questions about Expressions-with-variables (FREE)

Question 39424: Solve. 10x – 0.62 = 9(x – 0.95)
Click here to see answer by fractalier(2101)

Question 39423: Solve. 4(x + 2) – 3x = x – 6
Click here to see answer by fractalier(2101)

Question 39422: Solve. 6x + 4(3x – 2) = 6x + 2
Click here to see answer by fractalier(2101)

Question 39420: A principal of $5000 was invested in a savings account for 4 years. If the interest earned for the period was $400, what was the interest rate?
Click here to see answer by fractalier(2101)

Question 39415: Carlos can paint a room in three hours less time than Reggie. If both men work together, they can complete plainting the entire room in two hours. How long would it take for Carlos to do the job alone?
This is my work:
2/r-3 + 2/r = 1
Clear fractions be multiplying be (r-3) and (r)
2r + 2r - 6 = r^2 - 3r
subtract r^2 - 3r on each side
-r^2 + r - 6 = 0
Then there is no solution!
Click here to see answer by fractalier(2101)

Question 39433: The High Five Beanbag company can manufactrue a certain number of beanbags per day for $180. If they manufacture thirty more beanbags per day, the manufacturing price drops be $.50 per unit while the total daily manufacturing cost of $180 remains the same. How many beanbags did the company originally manufacture per day?
Click here to see answer by stanbon(57285)

Question 39434: In a parallel circuit, the joint resistance is 8 ohms. If one resistor is 12 ohms less than the second resistor, find both resistors.
Click here to see answer by longjonsilver(2297)

Question 39242: Simplify the expression
x-2 x+5
----- - -----
x^2-9 x+4
Click here to see answer by junior403(76)

Question 39432: The product of the first and third of three positive consecutive odd integers is 80 less then 23 times the second integer. find all three odd integers.
Click here to see answer by Nate(3500)

Question 39431: John can assemble a chair in 15 minutes more time than it takes Harold to assemble the same chair. If they work together, they can complete the job in 18 minutes. How long does it take each man to assemble the chair alone?
Click here to see answer by Paul(988)

Question 39501: I am a beginner.
I am stuck on correct answer:
What is the circumference of a circle with area 16rr

I am not using a specific book. I am just practicing.......
Click here to see answer by Nate(3500)

Question 39430: In rectangle ABCD, diagonal line BD is one more than twice lined BC. Line CD is 7 more than line BC. find line AB.
Click here to see answer by venugopalramana(3286)

Question 39582: Sorry if this is the wrong topic for this problem.

Solve the system by addition.
5x-3y=13
4x-3y=11
Click here to see answer by Nate(3500)

Question 39693: Gina is 9 years younger than her sister Brigget. Two years ago Brigget was twice as old as Gina was. how old is Gina now?
Thank you for helping me
Click here to see answer by stanbon(57285)

Question 39779: How many litres of 14% alcohol solution must be mixed with 20L of a 50% solution to get a 30% solution.
How do you set this problem up. I thought .14x+.5(x+20)=.3 but I am way off.
Click here to see answer by stanbon(57285)

Question 39649: i need help on going step by step in solving problems in Chapter 8.2 and 8.3
Click here to see answer by askmemath(368)

Question 40119: x-5y=-17
10y=2x+34 is it (-2,3) thank you!

substition
x-3y=-8
-12y=-4x-32 is it (4,4) thank you!
Click here to see answer by Nate(3500)

Question 40280: Is 5+ z =x an expression?
Click here to see answer by fractalier(2101)

Question 40230: Evaluate the expression when a = -5, b = 16, and c = 7.
7b + 10/a - √b
Click here to see answer by fractalier(2101)

Question 40316: Simplify:
Click here to see answer by Nate(3500)

Question 40318: Please someone help me solve this!!!!
Click here to see answer by Nate(3500)

Question 40320: Write an example of a polynomial that has a constant term of 6.
Click here to see answer by Nate(3500)

Question 40319: Write the slope intercept form of I need help with this one!!
Click here to see answer by Nate(3500)

Question 40321: Find the three concecutive even integers for which 3 times the largest is twice the sum of the two smallest integers. This question has me stumped, would someone help me figure it out?
Click here to see answer by Nate(3500)

Question 40527: c(c-1)(c+13)=0 solve for variable

five times the square root of a number is 15. find the number
Click here to see answer by Earlsdon(6287)

Question 40847: the value in cents of 5 quaters
Click here to see answer by mszlmb(115)

Question 35245: simplify the following algebraic expression
(4y)^7
-----
(4y)^3
Click here to see answer by fractalier(2101)

Question 38009: Phil & phyllis are siblings. phyllis has twice as many brothers
as she has sisters. phil has the same number of brothers as
sisters. how many girls and how many boys?''.
I can figure out the awnser in my head but i have no idea how to put it into a equation
Click here to see answer by psbhowmick(529)

Question 20835: waths the solution to 3x + 12=8x - 8
Click here to see answer by Nate(3500)

Question 41169: Three times a number, decreased by 8 is the same as twice the number, increased by 15?Find the number.
Click here to see answer by zeynep(43)

Question 28246: 0.5x-2y=17
2x+y=7
Click here to see answer by zeynep(43)

Question 41166: 3[2+v]-4v=v+16
Click here to see answer by vidhyak(94)

Question 41432: This question is very confusing. I don't even know where to start.
5x/2 - y = 9/10
3x/4 + 5y/6 = 2/3
Click here to see answer by rajagopalan(158)

Question 41439: It says to complete by filling in the blank.

y^2 - 13y + 36 = (y - 4)(y-___)

x^2 +9x + 18 = (x+3)(x+ ____)
Click here to see answer by gsmani_iyer(180)

Question 41476: i was wondering how to add (2x+1)+(x-2)-(x-3)+(5-x)
---- ---- ---- ----
3 4 6 2
the answer is 3x+34
------
12 but i dont know how to get that answer

Click here to see answer by AnlytcPhil(1276)

Question 41376: I'm in geometry but we are reviewing algebra and I'm a little confused. So if you could help i would be very thankful!
this is the problem....
4y/3= 18-y/6
Click here to see answer by zeynep(43)

Question 41769: find "b" when the reciprocal of b-2 is b+2
Click here to see answer by psbhowmick(529)

Question 41762: how do i work out this equation?
60=[400/(1+r)^3]
Click here to see answer by psbhowmick(529)

Question 41763: how do you solve 60=[400/(1+r)^3]
Click here to see answer by fractalier(2101)

Question 41719: Could you help me with a formulas to solve the following problems:
-4x+2 =42
3+2x+6x=3
-18=x-6
Click here to see answer by tutorcecilia(2152)

Question 42000: Solve by factoring:
Click here to see answer by checkley71(8403)

Question 42005: The slope of a line parallel to equals what?
Click here to see answer by checkley71(8403)

Question 42006: if the slope of a line is undefined, then the line must be:
a.horizontal
b.vertical
c.diagonal
d.other
Which answer is correct?
Click here to see answer by checkley71(8403)

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