explain how you got this answer please
2007-09-17 10:48:43 · 7 answers · asked by hellokittycutie1199 2 in Science & Mathematics ➔ Mathematics
5t - 15 - 2t
3t - 15
2007-09-17 10:59:00 · answer #1 · answered by Como 7 · 1⤊ 1⤋
First, you need to multiple the 5 through the parentheses:
5t-15-2t
Then, you want to reduce where possible:
5t-2t-15=
3t-15
This could also be expressed as
3(t-5)
But I think the first answer is preferable.
2007-09-17 17:55:07 · answer #2 · answered by Dachy 3 · 1⤊ 0⤋
SOLVE
First set = 5(t-3)-2t=0
Multiply...and get 5t-15-2t = 0
Subtract <5t-2t>....and get 3t -15 = 0
Add 15 to each side and get... 3t = 15
Divide each side by 3 and get... t = 5
PROOF
Substiute 5 for t and get...5(5-3)-2x5=0
subtract in () and get... 5 (2) - 2 x 5 = 0
Multilpy and get... 10 - 10 = 0
0 = 0
2007-09-17 18:06:14 · answer #3 · answered by Contented 6 · 1⤊ 1⤋
First: eliminate parenthesis - distribute the outer term with the terms in parenthesis.
5(t) + 5(- 3) - 2t
5t + (- 15) - 2t
5t - 15 - 2t
Sec: combine "like" terms - combine terms with the same variable.
5t - 2t - 15 = 3t - 15
2007-09-17 17:57:38 · answer #4 · answered by ♪♥Annie♥♪ 6 · 2⤊ 0⤋
Distrubute the 5. Combine the "t" terms to simplify.
2007-09-17 17:54:53 · answer #5 · answered by Anonymous · 0⤊ 2⤋
5t-15-2t --->
3t-15
2007-09-17 17:55:19 · answer #6 · answered by Anonymous · 0⤊ 1⤋
5(t-3)-2t
5t-15-2t
3t-15
3(t-5)
2007-09-17 17:54:20 · answer #7 · answered by grompfet 5 · 1⤊ 0⤋