8x-5(x-1)=20
2006-07-10 14:13:31 · 7 answers · asked by * 2 in Science & Mathematics ➔ Mathematics
8x-5x+5=20
3x+5=20
3x=15
x=5
2006-07-10 14:16:55 · answer #1 · answered by bandido 4 · 0⤊ 0⤋
8x-5(x-1)=20 using the distributive property:
8x-5x+5=20 now we do the like terms, 8x and 5x are both x's
3x+5=20 We move the number to the other side and +5 becomes -5
3x=20-5 Now we do 20-5
3x=15 Since 3x=15, x=15/3
x=5
5 is the answer.
2006-07-10 21:20:28 · answer #2 · answered by Science_Guy 4 · 0⤊ 0⤋
Assuming that you need to solve for x.. the answer is as follows
When asking these types of problems, please look through the steps and let them make sense. There are about 20 really basic rules that you learn in Pre-Algebra / Algebra I. If you can learn those rules, then you can solve any problem by applying them in different combinations.
8x-5(x-1) = 20
Distribute the -5 through
8x-5x+5 = 20
Subtract 5 for both sides
8x-5x = 15
Add like terms
3x=15
Divide by three on both sides
x = 5
2006-07-10 21:20:14 · answer #3 · answered by Michael M 6 · 0⤊ 0⤋
8x-5(x-1)=20
8x-5x+5=20
3x+5=20
subtract 5 from both sides
3x=15
divide both sides by 3
x=5
2006-07-10 23:03:39 · answer #4 · answered by Shorti 2 · 0⤊ 0⤋
8x-5(x-1)=20
8x+(-5)(x-1)=20
8x+(-5x)+5=20
-5 -5
3x =15
/3 /3
x =5
2006-07-10 21:19:29 · answer #5 · answered by *smartess 2 · 0⤊ 0⤋
8x-5x+5=20
3x+5=20
3x=20-5
3x=15
x=5
2006-07-10 23:25:32 · answer #6 · answered by Firdaus Yosman 3 · 0⤊ 0⤋
It is very nice to answer your question for me.
8x-5x+5=20
8x-5x=15
3x=15
x=5
Best regards
Ahmadi from of Iran
peemsahmadi@yahoo.com
2006-07-10 21:46:58 · answer #7 · answered by mohammadsaleh a 1 · 0⤊ 0⤋