document.write( "Question 1007601: what is the measure of angle C in a triangle with angle A is 2x angle B is 3x-9 and angle C is 2x which makes the equation 2x+3x-9+2x=180 degrees i know to add like terms which gives you 7x-9=180 add nine to both sides and you get 7x=189 then divide 7/189 which comes out to 27 then solve for angle C using 2x=__degrees thats the part where I get lost I don't know what to do with the 27 and 2x can someone help me so I can help my daughter \n" ); document.write( "
Algebra.Com's Answer #623489 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
\"7x-9%2B9=180%2B9\"
\n" ); document.write( "\"7x=189\"
\n" ); document.write( "So far, so good.\r
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\n" ); document.write( "\n" ); document.write( "Then, .... what?\r
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\n" ); document.write( "\n" ); document.write( "How do you UNDO the factor of 7 on the x?\r
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\n" ); document.write( "\n" ); document.write( "\"7x%281%2F7%29=189%281%2F7%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"7%281%2F7%29x=189%2F7\"\r
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\n" ); document.write( "\n" ); document.write( "\"x=189%2F7\"----------Now, what is this?\r
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\n" ); document.write( "\n" ); document.write( "\"x=%289%2A3%2A7%29%2F7\"\r
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\n" ); document.write( "\n" ); document.write( "\"highlight%28x=27%29\"\r
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\n" ); document.write( "\n" ); document.write( "You are given that measure of angle C is 2x and you now have x=27.
\n" ); document.write( "This should be clear and obvious. 2x=x+x.
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