document.write( "Question 172955: How to solve for x?\r
\n" ); document.write( "\n" ); document.write( "10.2=12*x+7*(1-x) \n" ); document.write( "
Algebra.Com's Answer #127787 by colliefan(242)\"\" \"About 
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10. 2=12*x+7*(1-x)\r
\n" ); document.write( "\n" ); document.write( "10. 2 = 12*x + 7 - 7*x
\n" ); document.write( "10. 2 = 12x -7x +7
\n" ); document.write( "10. 2 = 5x +7
\n" ); document.write( "10. 2 - 7 = 5x +7 - 7
\n" ); document.write( "10. -5 = 5x + 0
\n" ); document.write( "10. -5 = 5x
\n" ); document.write( "10. -5 * 1/5 = 5x * 1/5
\n" ); document.write( "10. -1 = x *5 * 1/5
\n" ); document.write( "10. -1 = x * 1
\n" ); document.write( "10. -1 = x or x = -1\r
\n" ); document.write( "\n" ); document.write( "Be sure to substitute 1 back into the original equation to confirm that the solution is -1.\r
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