6x-3y=18,
6x+3y=-12
solve by addition method for x I keep getting 1?

Question

sepia · Answer

6x - 3y = 18
6x + 3y = -12
12x = 6
x = 1/2
y = -5

J · Answer

6x-3y=18
6x+3y=-12 add vertically
--------------
12x+0=6
x=6/12 = 1/2

cidyah · Answer

6x-3y=18
6x+3t=-12

Add:
12x = 6
x = 1/2

6x+3y=-12
(6)(1/2) + 3y = -12
3 + 3y = -12
3y = -12-3
3y=-15
y=-5

x=1/2 ; y=-5

L. E. Gant · Answer

==> 12x = 6
==> X = 1/2

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