English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
All categories

I know I have to isolate my numbers and variables but Im confused

2006-08-31 17:16:26 · 18 answers · asked by MissLady0608 n 5 in Science & Mathematics Mathematics

18 answers

3s+2 = 5s+10
=> 3s-5s+2=5s-5s+10 [ subtract 5s from both sides]
=> -2s+2= 10
=>-2s+2-2=10-2 [subtract 2 from both sides]
=> -2s=8
=>-2s/-2=8/-2 [divide by -2 on both sides]
=>s= 4/-1
=> s= 4( -1)/ -1(-1) [multiply the numerator and the denominator of the right side by -1 ]
=>s=-4

2006-08-31 17:26:54 · answer #1 · answered by cgen2 2 · 0 0

3s + 2 = 5s + 10
put all the s at the same side,

3s - 5s = 10 -2
when switch side, "+" to "-", "-" to "+"

-2s = 8
s = 8/-2
s= -4

3s + 2 = 5s + 10
3(-4) + 2 = 5(-4) +10
-12 + 2 = -20 +10
-10 = -10

2006-08-31 19:23:14 · answer #2 · answered by evelyn_01 3 · 0 0

3s + 2 = 5s + 10 (Subtract 5s and 2 from both sides)
-2s = 8 (Divide both sides by -2)
s = -4

Check:
3(-4) + 2 = 5(-4) + 10
-12 + 2 = -20 + 10
-10 = -10
QED

2006-08-31 19:02:39 · answer #3 · answered by CSUFGrad2006 5 · 0 0

METHOD 1:
Let A = 3s+2 = 5s+10
A -3s = 2;....(i)
A - 5s = 10....(ii)
Subtracting (ii) from (i):
2s = -8;
Or, s = -8/2
Or, s = -4

METHOD 2:
3s+2 = 5s+ 10
Or, (3s+2) - (5s+10) = 0
Or, (3s-5s) +(2-10) = 0
Or, (-2s) + (-8) = 0
Or, -2s -8 = 0
Or, -2s = 0+8
Or, -2s = 8
Or, s = 8/-2
Or, s = -4

Thus in terms of the two methods given above, s = -4 is the required solution to the given problem.

2006-08-31 17:47:38 · answer #4 · answered by K Sengupta 4 · 0 0

ok, first what we do is to bring the variable to one side and the constants to the other.
So,it becomes :
3s-5s=10-2 ( I hope you must have understood the change in
sign)

If you havent , any constant or variable has its sign changed when it comes to a different side of the "=" sign.

next step would be
-2s=8 which leads to -s=8/2

2 was being multiplied to s in left hand side of "=" and so when it is taken to the right hand side. It will be dividing 8. The 2 goes from top on left hand side to bottom on right hand side.

An easy way to remember this

which is equal to -s=4


To make "s" positive. The negative sign shifts to 4.

Thus,

s= -4

hope I could make it clear enough.

bye,
faraz
author of spirituality blog
http://farazblog.blogspot.com

2006-08-31 17:29:58 · answer #5 · answered by awakenedmind2000 2 · 0 0

3s+2=5s+10

-2s=8

-s=4

s = -4

2006-08-31 17:23:07 · answer #6 · answered by chkibo2000 4 · 0 0

u have to get rid of the 2 by doing this

1.3s+2-2=5s+10-2
so now u have this

3s=5s+8

now u get rid of the 5 by doing this

3s-5s=5s+8

so now u should have -2s=8

now devide both sides by -2...
you should get s=-4

now check your work

3(-4)+2=5(-4)+10

-12+2=-20+10

-10=-10

and ther u have it!

2006-08-31 17:24:18 · answer #7 · answered by ryanisalifestyle 5 · 0 0

Put the variables on one side of the equation and the numbers on the other.
3s-5s=10-2
-2s=8
The rest is cake.

2006-08-31 17:20:50 · answer #8 · answered by ? 5 · 0 0

3s+2=5s+10

2s=8

s=4

2006-09-01 01:57:53 · answer #9 · answered by xavierbondoc_15 1 · 0 0

3 s + 2 = 5 s + 10

3 s + 2 - 2 = 5 s + 10 - 2

3 s = 5 s + 8

3 s - 5 s = 5 s - 5 s + 8

- 2 s = 8

-2 s / -2 = 8 / -2

s = -4

2006-08-31 17:18:26 · answer #10 · answered by Anonymous · 0 0

fedest.com, questions and answers