Question

Solve the simultaneous equation

2x-4y=19
3x+5y=1
Plz help me I’ve been stuck on this for a while 20 points

Answer 1

`x=(9)/(2) =4.5, y=-(5)/(2) =-2.5`

Explanation:

`2x-4y=19, multi ply- by 5\\10x-20y=95 , Eq I\\3x+5y=1, multiply - by 4\\12x+20y=4, Eq II\\Add -EQI -and- EqII\\\\10x-20y+12x+20y=95+4\\22x=99\\x=(99)/(22)=(9)/(2) =4.5\\3((9)/(2))+5y= 1\\5y=1-(27)/(2) =-(25)/(2)\\y=-(25)/(2)*(1)/(5) =-(5)/(2) =-2.5\\`

Answer 2

x=4.5

y=-2.5

Explanation:

Multiply 2x-4y=19 by 3

Multiply 3x+5y=1 by 2

Solve simultaneously