Question

how do you do elimination using multiplication ? example problem : 3x-3y=-6 -5x+6y=12

Answer 1

Multiply the first by 5 and the second by 3.

Answer 2

multiply the first equation with 2 ,then add the two equations y will be eliminated

Answer 3

Well, in order to do elimination, first you have to change one of the equations using multiplication.
3x-3y=-6
2(3x-3y) = 2(-6)
6x-6y= -12
Now, elimination:
6x-6y= -12
+ -5x+6y=12
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?

Answer 4

3x-3y=-6 (*5), and -5x+6y=12 by (*3)