SOLUTION: simultaneous equation by elimination 3x+4y=5 (1) 2x-5y=-12

Algebra.Com
Question 414597: simultaneous equation by elimination
3x+4y=5 (1)
2x-5y=-12
Found 2 solutions by mananth, ewatrrr:
Answer by mananth(16946)   (Show Source): You can put this solution on YOUR website!
3x+4y=5 .....1
2x-5y=-12.....2
3x+4y=5 .............1
2x-5y=-12.............2

multiply (1)by -2
Multiply (2) by 3
-6x-8y =-10
6x-15y =-36

Add the two equations

-23y=-46

/-23

y=2
Plug value of y in
3x+4y=5
3x+8=5
3x=-3
/3
x=-1

Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!


Hi

Solving System by elimination

3x+4y=5 

2x-5y=-12

Eliminating y

15x+20y=25        | 1st Equation Multiplied by 5  

 8x-20y=-48       | 2nd Equation Multiplied by 4

  23x = -23

   x = -1  and y = 2     |(5-3x)/4  = 8/4 = 2 

RELATED QUESTIONS


Solve by elimination 
7x+5y=-12... (answered by checkley79)

Solve the systems of equation by substitution
{x-5y=12
{3x=4y=-2
and
{2x-3y=5... (answered by funmath)

by using row reduction solve the following simultaneous equation.
2x-y=5
3x+4y=13

 (answered by checkley77)

by eliminating solve the pairs of simultaneous equation 6x-5y=-7  3x+4y=16
 (answered by josgarithmetic,MathTherapy)

solve algebraically this simultaneous equation
2x+5y=1... (answered by Fombitz)

I need help with these "solve by elimination" questions PLEASE and THANK YOU

4x+5y=6... (answered by stanbon)

Solve the following simultaneous equations using the elimination method.
7x - 11y = 1,... (answered by Edwin McCravy)

solve by elimination -3x+4y=12 and... (answered by lynnlo)

Solve by elimination:

1.8x + 11y= 20
5x - 11y= -59

2. 2x + 18y= -9
4x + 18y= -27
 (answered by jim_thompson5910)