2007-10-21 12:16:57 · 7 answers · asked by amani h 1 in Science & Mathematics ➔ Mathematics
4(3x - 3) - 8x = - 4
12x - 12 - 8x = - 4
4x = 8
x = 2 , y = 3
2007-10-24 07:01:48 · answer #1 · answered by Como 7 · 0⤊ 0⤋
equation 1: y=3x-3
equation 2: y=(-4+8x)/4 so y=-1+2x
therefore 3x-3=-1+2x
3x-2x=-1+3
x=2
substitute back into either:
y=3(2)-3
y=3
check 4(3)-8(2)=-4
correct...........
2007-10-21 12:23:44 · answer #2 · answered by Anonymous · 0⤊ 0⤋
12x-12-8x=-4
4x-12=-4
4x=8
x=2
y=3x-3
y=6-3
y=3
there you go, x=2 and y=3
2007-10-21 12:21:21 · answer #3 · answered by Anonymous · 0⤊ 0⤋
The answer is (2, 3)
2007-10-21 12:20:29 · answer #4 · answered by Anonymous · 0⤊ 0⤋
y=3x-3 4y-8x=-4
4(3x-3)-8x=-4
12x-12-8x=-4
4x-12=-4
4x=-4+12
4x=8
x=2
y=3(2)-3
y=3
2007-10-21 12:22:40 · answer #5 · answered by jc 3 · 0⤊ 0⤋
4(3x-3) - 8x = -4
this is substitution
2007-10-21 12:20:17 · answer #6 · answered by Anonymous · 0⤊ 0⤋
y=3x-3
4y-8x=-4
4(3x-3)-8x=-4
12x-12-8x=-4
4x-12+12=-4+12
4x=8
y=2
2=3x-3
5=3x
5/3=x
2007-10-21 12:21:17 · answer #7 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋