i have to write out the problem then solve it
2006-11-14 09:49:20 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
1 + (18-7n) = -9
Combine 1 and 18
19 - 7n = -9
Subtract 19 from each side
-7n = -28
Divide both sides by -7
n = -28/-7
Reduce
n = 4
2006-11-14 09:52:39 · answer #1 · answered by MsMath 7 · 4⤊ 3⤋
One more than the difference between 18 and 7 times a number is -9.
(18 - 7x) + 1 = -9
18 - 7x = -10
-7x = -28
x = 4
2006-11-14 17:53:52 · answer #2 · answered by Anonymous · 4⤊ 0⤋
Let n = the number.
Seven times that number = 7n
Difference between 18 and that product is 18 - 7n
One more than that is 18+1 -7n which = -9
Now 19 - 7n = -9
Add 7n to both sides to get 19 -7n + 7n = -9 + 7n
combine to get 19 = -9 + 7n
Add 9 to both sides to get 19+9 = 7n which is 28 = 7n
Divide both sides by 7 and get 4 = n
2006-11-14 17:55:35 · answer #3 · answered by Rich Z 7 · 4⤊ 0⤋
1+(18-7x)=-9
-1 -1
18-7x= -10
+7x +7x
18= -10+7x
+10 +10 (Subtracting negative 10 is the same as adding positive 10)
28=7x
4=x
2006-11-14 17:54:35 · answer #4 · answered by suniti 2 · 4⤊ 2⤋
1+18-7n=-9 (combine like terms)
19-7n=-9 (subtract 19)
-7n=-28 (divide by -7)
n=4
2006-11-14 17:55:20 · answer #5 · answered by moonfreak♦ 5 · 3⤊ 2⤋
1 + (18 - 7x) = -9
18 - 7x = -10
-7x = -28
x = 4
2006-11-14 17:52:52 · answer #6 · answered by neilz0616 2 · 4⤊ 0⤋
1+18-7n=-9
-7n=-9-18-1=-28
n=4
2006-11-14 17:51:41 · answer #7 · answered by yupchagee 7 · 4⤊ 0⤋
(18-7x)+1= -9
18-7x= -10
-7x=-28
x=4
2006-11-14 17:55:00 · answer #8 · answered by Grace 2 · 4⤊ 0⤋
1+(18*7x)=-9
distribute and you get 1+18+7x=-9
add like terms 19+7x=-9
subtract 19 from both sides7x=-28
and then divide both sides by 7 and you get x= -4
2006-11-14 17:53:28 · answer #9 · answered by doublez1992 1 · 2⤊ 4⤋