Mr. Fairbanks invested half his money in land, a tenth in stock, and a twentieth in bonds. He put the remaining $35,000 in a savings account. What is the total amount of money that Mr. Fairbanks saved or invested?
1/2 + 1/10 + 1/20 = 13/20
so, that leaves
7/20 x = 35000
now solve for x, the total amount