2006-10-16 13:57:03 · 8 answers · asked by Ali F 1 in Education & Reference ➔ Homework Help
x-2x-x-20=180
-2x-20=180
+20 +20
------------------
-2x = 200
x= -100 (negative 100)
2006-10-16 14:00:24 · answer #1 · answered by slam_92 3 · 1⤊ 0⤋
by cancelling x and -x you get
-2x-20=180
-2x=180+20
-2x=200
-x=200/2
-x= 100
x= -100
2006-10-16 21:16:49 · answer #2 · answered by moosa 5 · 0⤊ 0⤋
x-2x-x-20=180
-2x-20=180
-2x=180+20
-2x=200
x=200/-2
x=-100
2006-10-16 21:02:58 · answer #3 · answered by savmic 1 · 0⤊ 0⤋
x-2x-x-20=180
(x-x)-2x-20=180
0 -2x-20=180
bring 20 to other side
-2x=20+180
-2x=200
divide both sides by -2 to omit negative sign
-2x % -2 = 200 % -2
so
x = -100
ayt?
2006-10-16 21:05:24 · answer #4 · answered by noRjay 2 · 0⤊ 0⤋
-2x-20=180
-2x-20+20=180+20
-2x=200
x=-100
2006-10-16 21:02:43 · answer #5 · answered by Graycie 2 · 0⤊ 0⤋
x-2x-x-20=180
+20 +20
x-2x-x=200
-2x=200
x=-100
2006-10-16 21:01:25 · answer #6 · answered by youngnlovely991 1 · 0⤊ 0⤋
-2x - 20 = 180
-2x = 200
x = -100
(that is, if my math is correct)
2006-10-16 21:00:30 · answer #7 · answered by leihrana 1 · 0⤊ 0⤋
x-2x-x-20=180
add 20 to each side
x-2x-x=200
combine factors: x and -x cancel each other out
-2x=200
x=-100
2006-10-16 21:10:16 · answer #8 · answered by draws_with_crayons 3 · 0⤊ 0⤋