math
posted by david .
3/7x+5=8.
I tried to crossmulitplied and I got 3x+35=8. I divided 27 by 3 and I got 9. Is this right?

3/7x+5=8.
I tried to crossmulitplied and I got 3x+35=8. I divided 27 by 3 and I got 9. Is this right?
Not quite.
Given 3/7x + 5 = 8
Multiply through by 7x yields
3 + 35x = 56x
3 = 21x making x = 1/7.
Respond to this Question
Similar Questions

math
When a positive integer, n, is divided by 24 the remainder is 18. When n is divided by 8 the remainder is: A.0 B.1 C.2 D.4 E.6 I tried doing n/24=18 and I got 432 and when I divided it by 8 I got 54; am I misinterpreting the question? 
Physics=> quadradic equation
book says: (44.00x + x^2)(6.00x10^6C)= x^2(15.0x10^6C) they got: 3.00x^2+ 8.00x8= 0 I don't get how they got that quadradic equation. (I mulitplied over and then divided the 15.0x10^6 over and I didn't get what the book got) (my … 
Math
How to solve this (2x+5)/(x+1) > (x+1)/(x1) and graph? 
MATH
A sphere has five times the volume of a right cone that has a radius of 4.6 cm and a height of 7.7 cm. Determine the radius of the sphere to the tenth of a centimetre. This question is multiple choice and these were the options: A. … 
Math add subtract fractions
Can you check my answers: 2) 5/8  1/4 i got: 3/8 4) 1 1/2  2 4/5 i got: 7/10 6) 5 7/8 + 3 5/12 i got: 9 7/24 10) 3 1/2 + 2 2/5 i got: 5 9/10 18) 6 7/12 + 4 5/12 i got: 11 20) 7 9/10 + 3 3/10 i got: 11 1/5 22) 18 3/8 + 11 6/7 i got: … 
mAth EQUATION/FRACTIONS
Solving equations with fractions can you check these? 
Math
what is 4 5/6 + 3 2/3? First I had to find out the LCD which is 12. since 6 goes into 12 twice I X 5 by 2 and got 4 10/12 + 3 8/12 which gave me 7 18/12 I divided that by 2 and got 7 9/6 and then divided that by 3 and got 7 3/2 which 
Quick math help
Can someone please check my math Hw? Thank you!! Solve each system by elimination. 1. 8x+7y=1 9x7y=2 I got (1,1) 2. 4x+3y=1 4x7y=13 I got (2,2) 3. 7x6y=21 x6y=3 I got (3,0) 4. 2x+3y=16 2x5y=16 I got (8,0) 5. 7x+2y=13 
Algebra
You want to buy 8 books for $19.68 each, estimate the total cost show your work. I did 19.68 x 8 and got 157.44 then rounded the answer and got 157 am I right? 
math
I have 4 spinners each divided into 4 equal sections (labeled 1,2,3,4,) what is the probability of not all same?