Question

2x-3y=9
-5x-3y=30

Answer 1

x = -3 y = -5

Answer 2

subtract the 2nd eqn from the first to eliminate the y
you how have one eqn one variable solve for x
substitute for x in either of the original eqn to find y

Answer 3

can I have some work
?

Answer 4

subtracting second equation from first will NOT eliminate the y's

Answer 5

multiply one of the equations by -1. Then subtract, and eliminate the y's.

Answer 6

2x - 3y = 9 --->(-1)
-5x - 3y = 30
-----------------
-2x + 3y = -9 (result of multiplying by -1)
-5x - 3y = 30
-----------------add
-7x = 21
x = -3

2x - 3y = 9
2(-3) - 3y = 9
-6 - 3y = 9
-3y = 9 + 6
-3y = 15
y = -5

Answer 7

to kelliegirl when you subtract a negative you add
-(-3y) = +3y
-3y +3y = 0 they cancel

Answer 8

oh...I see...I just added them

Answer 9

sorry about that triciaal....my mistake