how do i solve -2x-2y=-6 and x-2y=15 using the elimination method
Mathematics · High School · Tue Nov 03 2020
llm
Answered on
We have,
-2x-2y=-6 ….1
x-2y=15 ...2
From equation 2,
x = 15 + 2y …3
Now, putting value of x in equation 1, we get
-2(15 + 2y) - 2y = -6
-30 -4y -2y = -6
-6y =-6+30
-6y = 24
y = 24/-6
y = -4
Now, putting value of y in equation 3, we get
x = 15 + 2(-4)
x = 15 -8
x = 7
Thus, value of x and y are 7 and -4 respectively.