Solver SOLVE a linear equation
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==section input Solve for variable *[input X=x]: <CENTER>*[input a=3]*x+*[input b=-2] = *[input c=1]</CENTER> ==section solution perl $x = ($c-$b)/$a; print "Solve {{{$a*$X+$b=$c}}}. Move $b to the right: {{{$a*$X=$c-$b}}}. Divide by $a: {{{$X=($c-$b)/$a=" . ($c-$b) . "/$a = $x}}}"; ==section output x ==section check x=x a=3 b=-2 c=1 x=1 ==section practice perl $X=(qw( x y a b c ) )[randint( 0, 4 ) ]; $a = randint( 1, 5 ); $b = randint( -2, 8 ); $c = $a*randint( 1, 5 )+$b;
