TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: if 4 xz + yw = 10 and xw + yz = 20 , what is the value of the expression ( 2 x + y ) ( 2 z + w ) ?

SOLUTION: 50 .

PROBLEM: Problem: a and b are 90 km apart they start to move each other simultaneously a at speed 10 and b at 5 km / hr if every hour they double their speed what is distance that a pass until he meet b ?

SOLUTION: 60 km

PROBLEM: Problem: . 005 / ? = . 01

SOLUTION:
. 5