2006-10-07 15:32:34 · 10 answers · asked by rain 2 in Science & Mathematics ➔ Mathematics
-2t/3=4-7s
-2t=12-21s
t=-6+(21/2)s
2006-10-07 15:36:59 · answer #1 · answered by Anonymous · 1⤊ 0⤋
the equation:
7s-2t/3=4
we want to solve the equation for t, therefore we have to find a way to isolate t on the left side of the equation.
1) subtract 7s on both side of the equation
7s-7s-2t/3=4-7s <=>
2t/3=4-7s
2) mutiply both side of the equation with 3 in
order to get rid of the fraction 2t/3
3*2t/3=(4-7s)*3 <=>
2t=(4-7s)*3
3) now divide with 2 on both side of the
equation i order to reduce the term 2t to t
2t/2=(4-7s)*3/2 <=>
t=(4-7s)*3/2
4) now we are actually finish, but we want to
reduce the expression, therefore we
multiplicate every term in the brackets with
3/2 and reduce
t=4*3/2-7s*3/2 <=>
t=6-s*21/2 =6-10½s
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2006-10-07 23:17:17 · answer #2 · answered by Broden 4 · 0⤊ 0⤋
Solve for t: 7s-2t/3 =4
7s-2t/3=4 multiply each side by 3
7s-2t=12 subtract 7s from both sides
-2t=12-7s divide each side by -2
t=12-7s/-2 Simplify
t = -(12-7s/2)
2006-10-07 22:38:49 · answer #3 · answered by J 1 · 0⤊ 1⤋
7s-2t/3=4
3/1 * 7s-2t/3=4 *3/1
7s-2t=12
-7s from both sides.
-2t=-7s+12
divde both sides by -2
t=7/2s-6
substitute equation in for t.
7s-2(7/2s-6)=4
solve for s.
7s-7+12=4
7s+5=4
7s=-1
s=-1/7
substitute s back into original equation to find t.
7(-1/7)-2t/3=4
-1-2t/3=4
times by 3
-1-2t=12
-2t=13
t=-13/2
2006-10-07 23:27:07 · answer #4 · answered by beaglemeister14 2 · 0⤊ 0⤋
I originally assumed that you meant 7s-(2t/3)=4, not (7s-2t)/3 =4.
7s-(2t/3) = 4
Multiply both sides of the equation by 3 to eliminate fractions to get
21s -2t = 12
Subtract 21s from both sides to get
-2t = 12 - 21s
Multiply both sides by -1/2 to get
t = -6 + (21/2)s = 11.5s -6
If you meant (7s-2t)/3 = 4 then multiply both sides by 3 to get
7s-2t = 12
Subtract 7s from both sides to get
-2t = 12-7s
Then divide each side by -2 to get
t= -(12-7s)/2 = (7s-12)/2= (7/2)s -6
2006-10-07 22:53:47 · answer #5 · answered by G.V. 6 · 0⤊ 1⤋
T=6+10.5s
2006-10-07 22:40:05 · answer #6 · answered by Sugar 2 · 0⤊ 1⤋
7s-2t/3=4
7s-2t=4*3
7s-2t=12
-2t=12-7s
t=12-7s/2
2006-10-10 21:31:49 · answer #7 · answered by ♥KiYa♥ 3 · 0⤊ 0⤋
7s - 2t/3=4
7s-2t=12
12+2t/7=s
Now replace s in the main equation
7(12+2t/7)-2t/3=4
7(12+2t/7)-2t=12
84+14t-2t=12
12t= -72
t= -6
2006-10-07 22:47:18 · answer #8 · answered by KaniKama 4 · 0⤊ 1⤋
7s-2t/3=4
7s-4=2t/3
t=3(7s-4)/2=10.5s-6
2006-10-09 21:13:23 · answer #9 · answered by yupchagee 7 · 0⤊ 0⤋
7s-2t=12
2t=7s-12
t=7s-12/2
2006-10-08 00:43:14 · answer #10 · answered by Zidane 3 · 0⤊ 0⤋