o.k. im taking a virtual class at my school and nobody can figure out how to work it. and im stuck on a problem. the problem is......
5x=-7x+12
please help me!!!!!!!!!!
2007-02-18 09:12:42 · 5 answers · asked by Sierra 3 in Education & Reference ➔ Homework Help
5x = -7x + 12
+7x +7x
12x = 12
x=1
2007-02-18 09:26:19 · answer #1 · answered by Anonymous · 0⤊ 0⤋
1. First, you need to get the variables on one side, so you add 7x to both sides (to keep the equation true).
2. Now you have 12x=12. So, to find what x is, simply divide both sides by 12 (since x is multiplied by 12). The answer is x=1.
These type of problems might look difficult but they are really very simple if you just think about it.
2007-02-18 17:22:26 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Here:
Problem --> 5x = -7x + 12
Add 7x to both sides:
5x = -7x + 12
+ 7x = + 7x <-- APOE (Addition Property of Equality)
----------------------
12x = 0 + 12 <-- APOO/AIP (Additive Property of Opposites/Additive Inverse Property)
12x = 12 <-- AIPOZ (Addition Identity Property of Zero)
1/12 (12x = 12) 1/12 <-- MPOE (Multiplication Property of Equality)
x = 1
Check:
5x = -7x + 12
Plug-in:
5(1) = -7(1) + 12
5 = -7 + 12
5 = 5
Hope I helped.
2007-02-19 00:46:22 · answer #3 · answered by Anonymous · 0⤊ 0⤋
5x=-7x+12
you would add 7x to both sides to get rid of the -7x. You would get 12x=12. then you would divide by 12 on both sides to isolate the x. your answer would be x=1.
2007-02-18 17:38:30 · answer #4 · answered by =) 2 · 0⤊ 0⤋
1st step: 5x+7x=12
2nd step: 12x=12
3th step: x=12/12
4th step: x=1
2007-02-18 17:21:28 · answer #5 · answered by Praise Praise 1 · 0⤊ 0⤋