SOLUTION: i want to solve thisimultaneous equation 5x-5y=5,4x-3y=25 i took the first equation x=5+5y/5 and them 4(5-5y)/5-3y=25 i donīt understand the siplpification

Algebra.Com
Question 187937: i want to solve thisimultaneous equation 5x-5y=5,4x-3y=25
i took the first equation x=5+5y/5 and them
4(5-5y)/5-3y=25
i donīt understand the siplpification
Found 2 solutions by checkley77, ankor@dixie-net.com:
Answer by checkley77(12844)   (Show Source): You can put this solution on YOUR website!
5x-5y=5 multiply this equation by -4
4x-3y=25 multiply this equation by 5 & then add them
-20x+20y=-20
20x-15y=125
-----------
5y=105
y=105/5
y=21 ans.
5x-5*21=5
5x-105=5
5x=5+105
5x=110
x=110/5
x=22 ans.
Proof:
4*22-3*21=25
88-63=25
25=25


Answer by ankor@dixie-net.com(22740)   (Show Source): You can put this solution on YOUR website!
solve these simultaneous equations:
5x - 5y = 5
4x - 3y = 25
:
Take the 1st equation:
5x - 5y = 5
Simplify, divide by 5:
x - y = 1
x = y + 1; use this for substitution for x in the 2nd equation:
:
4x - 3y = 25
4(y+1) - 3y = 25
4y + 4 - 3y = 25
4y - 3y = 25 - 4
y = 21
:
Find x:
x = y + 1
x = 21 + 1
x = 22
:
:
Check solution in the 2nd equation
4(22) - 3(21) = 25
88 - 63 = 25; confirms our solutions
RELATED QUESTIONS

i want to solve thisimultaneous equation 5x-5y=5,4x-3y=25 i took the first equation... (answered by Alan3354)
Question 1: what is y=-5/3x-6 written in standard form using integers? A. 5/3x+y=-6 B. (answered by TimothyLamb)
I'm having problems trying to solve this equation. I think it's the brackets that are... (answered by stanbon)
Find an equation of the line containing the point (-2,-5) and parallel to the line... (answered by jim_thompson5910)
Find an equation of the line containing the point (-2,-5) and parallel to the line... (answered by scott8148)
I have to solve by substitution. Clear fractions first. 1/5x+1/5y=1 1/5x-1/5y=9/5... (answered by Leaf W.)
Pascals Triangle :Please i need help with this thanks solve: 1)(3a^2+b)^4... (answered by Edwin Parker)
Hello, my name is Cody McCullough. I need help witha problem that I am helping my brother (answered by acerX)
Ummmmm hey i was wondering if u could help me on my hw, this problem says to: Find an... (answered by ankor@dixie-net.com)