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# View of /trunk/NationalProblemLibrary/Rochester/setAlgebra08LinearEqns/sw1_6_29.pg

Mon May 8 17:05:32 2006 UTC (7 years ago) by jjholt
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Added tags.


    1 ##DESCRIPTION
2 ##   Algebra: linear equations
3 ##ENDDESCRIPTION
4
5 ##KEYWORDS('algebra', 'linear equations')
6 ##Tagged by up2p
7
8 ##DBsubject('Algebra')
9 ##DBchapter('Equations')
10 ##DBsection('Linear')
11 ##Date('')
12 ##Author('')
13 ##Institution('Rochester')
14 ##TitleText1('')
15 ##EditionText1('')
16 ##AuthorText1('')
17 ##Section1('')
18 ##Problem1('')
19
20 DOCUMENT();        # This should be the first executable line in the problem.
21
23 "PG.pl",
24 "PGbasicmacros.pl",
25 "PGchoicemacros.pl",
27 "PGauxiliaryFunctions.pl"
28 );
29
30 TEXT(beginproblem());
31 $showPartialCorrectAnswers = 1; 32 33$a = random(3,9,1);
34 $b = random(1,5,2); 35$c = random(2,8,2);
36
37 TEXT(EV2(<<EOT));
38 Solve the equation $$\displaystyle \frac{a}{x+1}-\frac{b}{2} = \frac{c}{3x+3}$$.
39 $BR$BR $$x =$$ \{ans_rule(20) \}
40 $BR 41 EOT 42 43$ans = (6*$a-2*$c)/(3*$b) - 1; 44 ANS(num_cmp($ans));
45
46 ENDDOCUMENT();        # This should be the last executable line in the problem.
47