\documentclass[11pt]{article}
\usepackage{amsmath, amsthm, amssymb, amsthm, units, full page}
\usepackage{longtable}

\newcounter{prob_num}
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\begin{document}


\begin{tabular}{lr}
	Name:\underline{\hspace{8cm}}  & Math 095 Skill-Builder 1 \\
	& \hspace{3cm} 24 January 2011
\end{tabular}

\textbf{Section I}  Complete as many problems as possible in 45 minutes.  (Set a timer and work straight through, if possible.)
\vspace{.5cm}\\

\begin{longtable}{p{5cm}p{5cm}p{5cm}}
\vspace{4cm}
\prob  $6+x=20$&
\prob  $x+8=5$&
\prob  $-12+y=7$\\
\vspace{4cm}
\prob  $-7+w=0$&
\prob  $-12=-6+m$&
\prob  $b+20=-7$\\
\vspace{4cm}
\prob  $16+x=24$&
\prob  $-17+h=-2$&
\prob  $-35=-10+y$\\
\vspace{4cm}
\prob  $-8+w=3.2$&
\prob  $1.2+y=-6.7$&
\prob  $63+x=7$\\
\vspace{4cm}
\prob  $\frac{3}{5}+x=-\frac{2}{5}$&
\prob  $\frac{3}{4}+x=\frac{4}{3}$&
\prob  $.05+y=-\frac{1}{10}$\\
\vspace{4cm}
\prob  $2x=6$&
\prob  $3x=6$&
\prob  $5s=30$\\
\vspace{4cm}
\prob  $13x=-91$&
\prob  $-6x=24$&
\prob  $14t=42$\\
\vspace{4cm}
\prob  $-9x=-54$&
\prob  $-8y=48$&
\prob  $42=7x$\\
\vspace{4cm}
\prob  $-121=11t$&
\prob  $18x=42$&
\prob  $22x=55$\\
\vspace{4cm}
\prob  $26y=48$&
\prob  $-19t=76$&
\prob  $9x=24$\\
\vspace{4cm}
\prob  $18=-56x$&
\prob  $-18=-45m$&
\prob  $12x=92$\\
\vspace{4cm}
\prob  $51x=91$&
\prob  $21=-8x$&
\prob  $-.8x=12$\\
\vspace{4cm}
\prob  $1.6x=4$&
\prob  $6x=-1.8$&
\prob  $1.3x=9.1$\\
\vspace{4cm}
\prob  $-.008x=.16$&
\prob  $.01x=\frac{3}{4}$&
\prob  $-\frac{11}{2}x=\frac{55}{6}$\\
\vspace{4cm}
\prob  $\frac{x}{3}=3$&
\prob  $\frac{3}{x}=1$&
\prob  $-\frac{4}{3}x=.24$\\
\end{longtable}
\end{document}