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 2 years ago
[6.03] What is the value of the y variable in the solution to the following system of equations?
2x + y = 5
x + 3y = 0
−1
1
3
−3
 2 years ago
[6.03] What is the value of the y variable in the solution to the following system of equations? 2x + y = 5 x + 3y = 0 −1 1 3 −3

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abayomi12
 2 years ago
Best ResponseYou've already chosen the best response.0Let x = xylophones and y = yachts. Fred is buying xylophones and yachts. He does not pay attention to how much each costs, rather he just pays for all of them in one go. When he visits the shop on Monday, he buys two xylophones and one yacht for a total price of $9. He then thanks the salesman and goes home. The next day he buys three xylophones and four yachts for a total price of $26. Fred is now deeply curious as to how much his xylophones and yachts would have cost him individually, so he sets up a set of simultaneous equations in an attempt to find an answer to the ultimate question... 2x + y = 9 3x + 4y = 26 Transpose equation 1 and substitute into 2: y = 9  2x 3x + 4(9  2x) = 26 3x + 36  8x = 26 5x = 10 x = 2 y = 9  4 y = 5 So it turns out that xylophones cost $2 each and yachts cost $5 each. ANSWERS: 3. Parallel 4. 6 + x 8. 1 9. (9, 1) 10. Multiply the first equation by 2 11. 42 12. 22.95 + 0.08m = 27.95 + 0.06m 13. 70 14. d = 3(r – 30) and d = 2(r + 30) 15. 3 hours 16. (5, 1) 17. Green area: 2x + y > 2 and x − y < 6 Yellow area: 2x + y > 2 and x − y > 6 18. Answer shown in part 2 (very long answer)

mathslover
 2 years ago
Best ResponseYou've already chosen the best response.0\[\large{\color{red}{2x+y=5}}\] \[\large{\color{blue}{\textbf{Solve for x in this eqn}}}\]

mathslover
 2 years ago
Best ResponseYou've already chosen the best response.0@tej18 what do you get after solving for x in 2x+y=5

sauravshakya
 2 years ago
Best ResponseYou've already chosen the best response.1OMG......... what is that @abayomi12

tej18
 2 years ago
Best ResponseYou've already chosen the best response.0i dont get it @mathslover

mathslover
 2 years ago
Best ResponseYou've already chosen the best response.02x+y=5 2x=5y solve for x

abayomi12
 2 years ago
Best ResponseYou've already chosen the best response.0teji u still don't get the answer that all the answer i just solved there

tej18
 2 years ago
Best ResponseYou've already chosen the best response.0@mathslover so x= 5/2  y/2??

mathslover
 2 years ago
Best ResponseYou've already chosen the best response.0x=(5y)/2 put this in 2nd eqn

mathslover
 2 years ago
Best ResponseYou've already chosen the best response.0solve for y then you will get your answer

mathslover
 2 years ago
Best ResponseYou've already chosen the best response.0\[\large{x=\frac{5y}{2}}\] \[\large{x+3y=0}\] \[\large{\frac{5y}{2}+3y=0}\] \[\large{\frac{5y+2y}{2}=0}\] \[\large{5+y=0}\]

mathslover
 2 years ago
Best ResponseYou've already chosen the best response.0oops sorry : \[\large{\frac{5y+6y}{2}=0}\] \[\large{5+5y=0}\]

Sulli_lim
 2 years ago
Best ResponseYou've already chosen the best response.0Answer: 1 2x+y=5 x+3y=0 So, x=3y Substitute x=3y into 2x+y=5 2(3y)+y=5 6y+y=5 5y=5 y=1
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