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

2x + 3 = 8

Thank you

2007-07-15 14:25:59 · 13 answers · asked by peanut1 1 in Science & Mathematics Mathematics

13 answers

2x + 3 = 8
2x = 8-3
x = 5/2
x = 2.5

2007-07-15 14:28:22 · answer #1 · answered by Telomere 2 · 0 0

work backwards
read 2x+3=8 like this
2 (times what) + 3 =8
work the problem backwards (i.e. 2 + 3= 5, 5-3 =2)
well subtract the 3 from the 8... that leaves 5
so now the problem will read 2 times what equals 5
-- you have probably learned before, that you do the opposite to find the answer...
-- essentially you switch the problem so it's backwards
5 divided by 2 or (5/2)which is the same as 2 and 1/2

2007-07-15 21:39:00 · answer #2 · answered by stifflergal 4 · 0 0

x= 5/2

2007-07-15 21:28:44 · answer #3 · answered by Anonymous · 0 0

Solve,

2x + 3 = 8

Subtract both sides by 3,

2x + 3 - (3) = 8 - (3)

2x = 5

Divide both sides by 2,

2x/2 = 5/2

x = 2.5

2007-07-15 21:28:42 · answer #4 · answered by ideaquest 7 · 0 0

2x + 3=8
subtract 3 from both sides
2x=5
divide both sides by 2
x=5/2
x=2.5

2007-07-15 21:27:32 · answer #5 · answered by FL๑Яida GЯL ♥♥♥ 4 · 1 0

5/2

2007-07-15 21:28:16 · answer #6 · answered by Sweetheart88 5 · 0 0

2x + 3 = 8
2x = 8 - 3
2x = 5
x = 2.5

Another method is to cover up the 2x with your finger and ask what number should be underneath your finger.
The answer to this is 5
Thus:-
2x = 5
x = 2.5

2007-07-16 02:51:03 · answer #7 · answered by Como 7 · 0 0

minus 3 from both sides
then it becomes 2x=5
then divide by 2 on both sides
x=5/2 -or-2/1/2

2007-07-15 21:28:46 · answer #8 · answered by kamaria_gotrhythm 3 · 0 0

2 X 2.5 +v5 = 8

2007-07-15 21:29:06 · answer #9 · answered by jmiller 5 · 0 0

You need to get x (the unknown) by itself on one side of the equation.
So
2x = 8-3
so
2x=5
so
x = 5/2

Remember you can do any arithmetic operation you like to achieve this, so long as you do it to *both* sides of the equation.
.

2007-07-15 21:29:15 · answer #10 · answered by tsr21 6 · 0 0

fedest.com, questions and answers