## GMAT Problem Solving 95: Algebraic word problems

Try this GMAT problem solving question on algebraic system of equations with more unknowns than the number of equations. A classic type of problem seen on the GMAT, often shows up in data sufficiency as well.

The check for a luncheon of 3 sandwiches, 7 cups of coffee and one piece of pie came to \(\$3.15\). The check for a luncheon consisting of 4 sandwiches, 10 cups of coffee and one piece of pie came to \(\$4.20\) at the same place. The cost of a luncheon consisting of one sandwich, one cup of coffee, and one piece of pie at the same place will come to

- \(\quad \$1.70 \)
- \(\quad \$1.65 \)
- \(\quad \$1.20 \)
- \(\quad \$1.05\)
- \(\quad \$0.95 \)