2007-12-12 09:34:54 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
8w - w = 50 + 13
7w = 63
w = 9
2007-12-14 01:39:56 · answer #1 · answered by Como 7 · 3⤊ 0⤋
w=9
subtract a w from both sides and add 13 to both sides to get:
7w=63
7 x 9 = 63
w=9
The variable "w" has to be the same number on both sides.
You can also guesstimate the number by figuring the number on the right side of the equals sign is greater than 50 (w+50).
So, the number on the left has to also be higher than 50 because of the =(equals) sign. In order to accomplish that, you have to make sure the "8 x w" is greater than 50 so that when you subtract 13, it is still greater than 50.
When you try 10 as the w, the final answer is 67=60 WRONG
11, the answer becomes 75=61, even more WRONG
When you try 9 as the w, the answer is 59=59 RIGHT
8 x 9 -13 = 9 + 50
72 - 13 = 59
59=59
2007-12-12 17:41:45 · answer #2 · answered by endpov 7 · 0⤊ 1⤋
8w - 13 = w + 50
8w - w = 50 + 13
7w = 63
w = 63 / 7
= 9
2007-12-12 17:39:06 · answer #3 · answered by mstq 3 · 0⤊ 0⤋
OK
Key is to combine, and then isolate the variable
8w -13 = w+50; subtract w from both sides
7w -13 = 50 ; now add 13 to both
7w = 63 ; divide by 7
w = 9
Check
8(9) - 13 = 9+ 50 ??
72 -13 = 59
59 = 59 YES!!
Hope that helps.
2007-12-12 17:39:16 · answer #4 · answered by pyz01 7 · 0⤊ 0⤋
8w-13=w+50
add 13 to both sides
8w=w+63
subtract w from each side
7w=63
divide each side by 7
w=9
2007-12-12 17:39:15 · answer #5 · answered by Caitlyn Marie 2 · 0⤊ 0⤋
8w-13=w+50
8w=w+63 add fifteen
7w=63 subtract w
w=9 divide by seven
w=9 hope this helps
2007-12-12 17:40:07 · answer #6 · answered by jones 2 · 0⤊ 0⤋
w contains the variable to solve for, move it to the left-hand side of the equation by subtracting w from both sides.
8w-13-w=50
add -w to 8w to get 7w.
7w-13=50
add 13 to both sides.
7w=13+50
Add 50 to 13 to get 63.
7w=63
Divide each term in the equation by 7.
(7w)/(7)=(63)/(7)
Simplify the left-hand side of the equation by canceling the common terms.
w=(63)/(7)
Simplify the right-hand side of the equation by simplifying each term.
w=9 is your final answer.
hope it helps.
2007-12-12 17:37:55 · answer #7 · answered by stringsdepotplus 2 · 0⤊ 1⤋
make one side equal to 0.
(8w-13)-(w+50) = 0
7w- 63 = 0
7w = 63
w = 63/7
w = 9
2007-12-12 17:38:57 · answer #8 · answered by nopowerhere 2 · 0⤊ 0⤋
get the varialbe alone and then solve for hte variable
subtract 1w from both sides and add 13 to both sides
7w = 63
divide by 7
w = 9
2007-12-12 17:37:13 · answer #9 · answered by Ms. Exxclusive 5 · 0⤊ 0⤋