2(x -2) =x+ 3
First step in solving: 2x-2=x+3
What error has been made. What could be done to
avoid this error?
2007-06-14 11:37:40 · 7 answers · asked by snickernikki727 1 in Education & Reference ➔ Homework Help
You are not using the distributive method! The 2 on the outside of the paranthesis must be multiplied by both the x and the 2 on the inside. It should look like this!
2(x-2)=x+3
2x-4 = x+3
Then get your variables on one side and your whole numbers on the other!
2x - 4 = x + 3
2x - 4 + 4 = x + 3 + 4
2x = x + 7
2x - x = x - x +7
x = 7
Hope this helped!!! I am a math teacher, so if ya ever need help again let me know!!!
2007-06-14 11:43:40 · answer #1 · answered by Anonymous · 0⤊ 0⤋
The first error was in removing the parenthesis. Anything in parenthesis must be done first. The first step should be:
2x - (2*2) = x + 3
2x-4 = X + 3
2x-4+4 = X + 3 + 4
2x = X + 7
2x + 1x = X-X + 7
3x = 7
x = 7/3
2007-06-14 18:45:30 · answer #2 · answered by moondrop000 5 · 0⤊ 0⤋
First of all, if you multiply the x by 2 (to eliminate the parentheses), you must also multiply the 2 by 2, thus giving you
2x-4=x+3
the next step would be
2x-x=3+4 (change positives and negatives when switching sides)
giving you
x=7
now just to be sure: 2(7-2)=7+3
14-4=7+3
10=10
there you go dude
2007-06-14 18:50:40 · answer #3 · answered by lelutinbleu2007 2 · 0⤊ 0⤋
2(x-2)=x+3 2 times x and 2 times -2
2x+4=x+3
-3 -3
2x+1=x
2007-06-14 18:45:51 · answer #4 · answered by pinkpanther_raya 2 · 0⤊ 0⤋
when you multiply 2(x-2) you would get 2x-4, so the first step would look like 2x-4=x+3. x = 7
2007-06-14 18:43:28 · answer #5 · answered by Anonymous · 2⤊ 1⤋
2(x-2)=x+3
2x-4=x+3
-x+4=-x+4
x=7
2007-06-14 18:43:12 · answer #6 · answered by a1c_big_tex 3 · 0⤊ 0⤋
it should be:
2x-4=x+3
because 2(x-2)=2x-4
2007-06-14 18:41:37 · answer #7 · answered by kperk_56 2 · 0⤊ 0⤋