SOLUTION: .05x+.25y=11 and .15x+.05y=-12

Question 309875: .05x+.25y=11 and .15x+.05y=-12
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
.05x+.25y=11
.15x+.05y=-12
--------------------
Multiply thru both equations by 100.
--------------------
5x + 25y = 1100
15x + 5y = -1200
-----------------------
Multiply thru the 1st equation by 3:
15x + 75y = 3300
15x + 5y = -1200
-------------------
Substract the 2nd from the 1st:
70y = 4500
y = 64.29
------
Substitute into 5x + 25y = 1100
5x + 25*64.29 = 1100
5x = -507.14
x = -101.42
==============
Check in 15x+5y = -1200
15(-101.42) + 5(64.29) = -1199.85
Answers check.
================
Cheers,
Stan H.

RELATED QUESTIONS
Solve by the elimination method. .05x+.25y=44... (answered by checkley77)

10+.15x>50+.05x (answered by ReadingBoosters)

I have to graph the following two equations on the same graph y=.05x+60 and y=.15x+40. I (answered by sofiyac)

15x+12=12x-6 (answered by khwang,lpilon,WannabeCAgirl83)

15x+12=12x-6 (answered by lpilon)

3x2 -15x + 12... (answered by jim_thompson5910)

{{{8x-12=15x-4x}}} (answered by College Student)

15x^2+36x+12 (answered by richwmiller)

yn= 1.05y(n-1) +2 and y(0) = 3. Find an explicit formula for... (answered by MathLover1,mccravyedwin,Edwin McCravy)