Asked by Tika
Please help me solve this system of equations? Sorry addition/equal key is not working.
-2x plus 9y equal 3
-3x-4y equal 22
-2x plus 9y equal 3
-3x-4y equal 22
Answers
Answered by
Reiny
-2x + 9y = 3
-3x - 4y = 22
first equation times 3
-6x + 27y = 9
second equation times -2
6x + 8y = -44
add the new equations:
35y = -35
y = -1
sub back into original -2x + 9y = 3
-2x - 9 = 3
-2x = 12
x = -6
x= -6 , y = -1
of course you should realize that there are many other ways to solve this, that was just my choice.
-3x - 4y = 22
first equation times 3
-6x + 27y = 9
second equation times -2
6x + 8y = -44
add the new equations:
35y = -35
y = -1
sub back into original -2x + 9y = 3
-2x - 9 = 3
-2x = 12
x = -6
x= -6 , y = -1
of course you should realize that there are many other ways to solve this, that was just my choice.