Jim has $50, which is d dollars more than twice what Mark has. Write an equation to find the money that Mark has.

Answer 1

General Equation:

2x + d = 50

x is equal to the amount of money mark has. so we set to 2x to account for twice that amount. since the question says d dollars more, we know we are adding d dollars to 2x to get to Jim's $50. solve for x to find the money that mark has.

so the money that mark has equals x:

x = (50 - d)/2