3x – 3y = –12
y = 3x – 2
2006-09-24 12:24:46 · 6 answers · asked by Rolando C 1 in Education & Reference ➔ Homework Help
3X-3Y= -12
Y=3X-2
3X-3(3X-2)= -12
3X-9X+6= -12
-6X= -18
X=3
Y=3(3)-2
Y=9-2
Y=7
3(3)-3(7)= -12
9-21= -12
-12= -12
7=3(3)-2
7=9-2
7=7
2006-09-24 12:30:49 · answer #1 · answered by Bastet's kitten 6 · 0⤊ 0⤋
(1) 3x – 3y = –12
(2) y = 3x – 2
Substitute y = 3x - 2 into equation (1)
3x - 3(3x - 2) = -12
3x - 9x +6 = -12
-6x = -6
x =1
Subsitue x = 1 into equation (2)
y = 3x - 2
= 3 - 2
=1
I'm sure the method is right. Check for careless errors.
2006-09-24 19:36:35 · answer #2 · answered by Anonymous · 0⤊ 0⤋
3x - 3(3x-2) = -12
3x - 9x + 6 = -12
-6x + 6 = -12
-6x = -18
x = 3
y = 3(3) - 2
y = 9 - 2
y = 7
Test
3(3) - 3(7) = -12
9 - 21 = -12
-12 = -12
Correct
2006-09-24 19:28:52 · answer #3 · answered by fetchrat 3 · 0⤊ 1⤋
3x - 3(3x-2) =-12
3x - 9x + 6 = -12
-6x + 6 = -12
-6x = -18
x = 3
2006-09-24 19:29:21 · answer #4 · answered by DE 2 · 0⤊ 0⤋
3x - 3(3x -2) = -12
3x -9x +6 = -12
-6x = -18
x = 3
2006-09-24 19:28:08 · answer #5 · answered by gburgmommy 3 · 1⤊ 0⤋
x=6
y=2
if you want the steps, email me at xc_girl92@sbcglobal.net
2006-09-24 19:30:13 · answer #6 · answered by Baby D 2 · 0⤊ 0⤋