Question

Linear equations using the elimination method
3х - 2y = 7
у -Х -1

Answer 1

Explanation:

3х - 2y = 7

у = -Х -1 => x+y = -1

by elimination methode :

elimination of y :

3x - 2y = 7

2x+ 2y = -2

_________+

5x = 5

x = 1

elimination of x

3x - 2y = 7

3x +3y = -3

_________-

-5 y = 10

y = -2

the solutions : {(1, -2)}