How do yo solve this difficult problem of Equations?
If you have this equation
Find "x+y"
If you have this equation
Find "x+y"
1 Answer
Aug 12, 2018
Explanation:
2x+y=9to(1)
3x-2y=3to(2)
"multiply equation "(1)" by 2"
4x+2y=18to(3)
"add "(2)" and "(3)" term by term"
(3x+4x)+(-2y+2y)=(3+18)
7x=21
"divide both sides by 7"
x=21/7=3
"substitute "x=3" into equation "(1)
6+y=9rArry=9-6=3
"solution is "(x,y)to(3,3)
"hence "x+y=3+3=6