document.write( "Question 389715: How do you solve this formula for the variable (that i put in parenthesis to indicate): I=p{r}t \n" ); document.write( "
Algebra.Com's Answer #276247 by Edwin McCravy(20055)\"\" \"About 
You can put this solution on YOUR website!
\r\n" );
document.write( "\"I\"\"%22%22=%22%22\"\"p%2Ar%2At\"\r\n" );
document.write( "\r\n" );
document.write( "There is nothing added to or subtracted from the term involving the \" r \".\r\n" );
document.write( "So we can simply put the \" p \" and the \" t \" underneath both sides of the\r\n" );
document.write( "equation and then cancel them away on the right, leaving only the \" r \".\r\n" );
document.write( "\r\n" );
document.write( "So we put \" p*t \" underneath both sides of the equation, like this\r\n" );
document.write( "\r\n" );
document.write( "\"I%2F%28p%2At%29\"\"%22%22=%22%22\"\"%28p%2Ar%2At%29%2F%28p%2At%29\"\r\n" );
document.write( "\r\n" );
document.write( "Then we cancel the \" p \"'s and the \" t \"'s on the right, like this:\r\n" );
document.write( "\r\n" );
document.write( "\"I%2F%28p%2At%29\"\"%22%22=%22%22\"\"%28cross%28p%29r%2Across%28t%29%29%2F%28cross%28p%29cross%28t%29%29\"\r\n" );
document.write( "\r\n" );
document.write( "Then all that's left on the right that didn't cancel was the \" r \".  So we\r\n" );
document.write( "have:\r\n" );
document.write( "\r\n" );
document.write( "\"I%2F%28p%2At%29\"\"%22%22=%22%22\"\"r\"\r\n" );
document.write( "\r\n" );
document.write( "And then it's customary to write the final answer so that the letter\r\n" );
document.write( "being solved for is on the left. \r\n" );
document.write( "\r\n" );
document.write( "\"r\"\"%22%22=%22%22\"\"I%2F%28p%2At%29\"\r\n" );
document.write( "\r\n" );
document.write( "Edwin
\n" ); document.write( "
\n" );