Make wolfram alpha solve linear 2 equations with 2 unknowns
This is a very cool way to make wolfram alpha do the math in your code, using php.
<?php $app_id = "YOUR_APP_ID"; $x1 = 4; $y1 = 4; $input1 = "solve($y1%3Da*$x1%2Bb%2Ca)"; $xmlf1 = "http://api.wolframalpha.com/v2/query?appid=$app_id&input=$input1&format=plaintext"; $xml1 = simplexml_load_file("$xmlf1") or die("Error: Cannot create object"); $a = $xml1->pod[1]->subpod->plaintext; echo $a; $antal_tegn = strlen($a); $a = substr($a, 4, $antal_tegn); //echo $a; echo "<br>"; $x2 = 8; $y2 = 8; $input2 = "solve($y2%3D$a*$x2%2Bb%2Cb)"; $xmlf2 = "http://api.wolframalpha.com/v2/query?appid=$app_id&input=$input2&format=plaintext"; $xml2 = simplexml_load_file("$xmlf2") or die("Error: Cannot create object"); $b = $xml2->pod[1]->subpod->plaintext; echo $b; $antal_tegn = strlen($b); $b = substr($b, 4, $antal_tegn); //echo $b; ?>