4(5n-7)=10n+2
please show all of your work..
2007-01-09 11:41:30 · 15 answers · asked by brandy 1 in Education & Reference ➔ Homework Help
i got 3 is that right
2007-01-09 11:46:56 · update #1
*first you use distrubutive property
4 times 5n - 4 times 7
20n-28=10n+2
*then you subract 10n from each side (in order to get n on one side of the equation)
10n-28=2
*then add 28 to each side (to get rid of the 28 on the left side you have to do the opposite, since it is -28 you have to add)
10n=30
*divide by 10 on each side (to get n by itself)
n=3
yeah you got the right answer!
2007-01-09 11:51:34 · answer #1 · answered by XOXO 5 · 0⤊ 0⤋
You distribute he 4 to 5n and the 7 which would make it
(20n-28)=10n+2
you add 28 to the other side
20n=10n+30
you subtract the 10 n from both sides
which would make is 10n=30
then you divide 10 from both sides to get the 'n' alone n=3 :)
2007-01-09 11:50:05 · answer #2 · answered by Anna 2 · 0⤊ 0⤋
1) distribute
4(5n-7)= 10n +2 changes to (20n-28)= 10n+2
2)group like terms
20n-10n=2+28
3)arithmatic
10n= 30
4) isolate the n by dividing
n=3
2007-01-09 11:47:45 · answer #3 · answered by L P 2 · 0⤊ 0⤋
4(5n-7)=10n+2
multiply through
20n - 28 = 10n + 2
subtract 10 n from both sides
10n - 28 = 2
add 28 to both sides
10n =30
divide both sides by 3
n = 3
2007-01-09 11:46:48 · answer #4 · answered by Nick G 1 · 0⤊ 0⤋
4(5n-7)=10n+2
multiply the terms
20n-28 = 10n + 2
subtract 10n from both sides and add 28 to both sides
10n = 30
divide both sides by 10
n = 3
2007-01-09 11:45:42 · answer #5 · answered by ignoramus 7 · 1⤊ 0⤋
4(5n-7)=10n+2
20n-28=10n+2
+28 +28
20n=10n+30
-10n -10n
10n=30
/10 /10
n=3
2007-01-09 11:46:44 · answer #6 · answered by Anonymous · 0⤊ 0⤋
20n - 28 = 10n + 2 (multiply out the expression)
20n = 10n + 30 (add 28 to both sides)
10n = 30 (subtract 10n from both sides)
n = 3 (divide both sides by 10)
2007-01-09 11:49:02 · answer #7 · answered by buz 7 · 0⤊ 0⤋
1. Distribute the 4
4(5n-7) = 20n-28
2. so now you have
20n-28=10n+2
3. group like terms
20n-28=10n+2
-2 -2
20n-30=10n
-20n -20n
-30= -10n
/ -10 /-10
3=n
2007-01-09 11:47:28 · answer #8 · answered by Anonymous · 0⤊ 0⤋
20n-28=10n+2
get the n's on one side and the numbers on the other side
10n=30
divide both sides by 10
n=3
2007-01-09 11:46:21 · answer #9 · answered by luvbugz87 3 · 0⤊ 0⤋
4(5n - 7) = 10n +2
20n -28 = 10n +2
10n -28 = 2
10n = 30
n = 3
2007-01-09 11:45:30 · answer #10 · answered by angie20k 4 · 1⤊ 0⤋