Question 1187749
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Step 1:  Using the given information, define variable(s) and expression(s) to represent the numbers in the problem.<br>
Let x = number Troy has
Then 2x-4 = number Liz has  (4 less than twice as many as Troy)<br>
Step 2:  Use those variables and expressions to write an equation based on the given information.<br>
(x) + (2x-4) = 149  (the total number of cards the two of them have is 149)<br>
Step 3:  Solve the equation using basic algebra to find x<br>
Step 4:  Use the value of x you found to determine the number of cards each one has.<br>
Step 5:  Verify that your answer satisfies all the conditions of the problem.<br>
I leave it to you to do steps 3 to 5....<br>