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2007-05-27 07:15:41 · 9 answers · asked by Anonymous in Science & Mathematics Mathematics

9 answers

Solve for "x" in the following equation...

2x+(x+45)+(2x+40)=180

First: eliminate parenthesis - rewrite the expression...

2x+x+45+2x+40=180
2x+x+2x+45+40=180
5x+85=180

Sec: combine "like" terms - subtract 85 from both sides (when you move a term to the opposite side, always use the opposite sign).

5x+85-85 = 180-85
5x = 180-85
5x = 95

Third: isolate "x" - divide both sides by 5.

5x/5 = 95/5
x = 95/5
x = 19

2007-05-27 07:23:12 · answer #1 · answered by ♪♥Annie♥♪ 6 · 1 0

2x + (x + 45) + (2x + 40) = 180 or

2x + x + 45 + 2x + 40 = 180 or

5x + 85 = 180 or

5x = 180 - 85 = 95.

Therefore: x = 95/5 = 19.

2007-05-27 14:24:22 · answer #2 · answered by quidwai 4 · 0 0

start by removing the parantheses:
2x + (x+45) + (2x+40)=180 becomes
2x+x+45+2x+40=180

then collect like terms
2x+x+45+2x+40=180 becomes
5x+85=180

now isolate the variable by subtracting the constant term from both sides of the equation:
5x+85=180 becomes
5x=95

now divide both sides of the equation by the coeficient of the variable to solve for the variable (5 is the coeficient and x is the variable)
5x=95 becomes
x=19

2007-05-27 14:22:46 · answer #3 · answered by dave c 2 · 2 1

2x+(x+45)+(2x+40)=180 x=??
2x+x+45+2x+40=180 x=??
5x+85=180 x=??
5x=95 x=??
x=19

2007-05-27 14:25:31 · answer #4 · answered by WMY 1 · 1 0

x=19

2007-05-27 14:26:45 · answer #5 · answered by Hello 2 · 0 0

19

2007-05-27 14:22:08 · answer #6 · answered by harley49916 3 · 0 1

2x+x+2x=180-45-40
5x=95
x=19

2007-05-27 14:33:28 · answer #7 · answered by mikrodimitris 3 · 0 0

5x + 85 = 180
5x = 95
x = 19

2007-05-27 17:00:32 · answer #8 · answered by Como 7 · 0 0

start by removing the ()
in this problem, none are needed. then add together each term that has 'x'. subtract any number that does not have an 'x' from the right side of the equation. then divide each side of the equation by the number next to the 'x'. that will give you your result

2007-05-27 14:23:25 · answer #9 · answered by Jen 3 · 0 1

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