Question

3x+2y=19
3x+3y=-6
solve the simultaneous equation by using elimination method.

Answer 1

3x+2y=19
3x+3y=-6--> Multiply by -1:

3x+2y=19
-1(3x+3y=-6)

3x+2y=19
-3x-3y=6
-----------
-1y=25
y= -25

Now, plug it back into the first equation:
3x+2(-25)=19
3x-50=19
3x=69
x=23

x=23, y= -25

Does it make sense? :o)

Answer 2

@girleegurl In this case should you add or subtract using elimination method?