Question 1088521
Sam spent 40 percent of his money and an addition $13 on some shirts.
 He spent 70 percent of the remaining money and an additional $68 on a radio. If he had $126 left, how much money did Sam have at first? 
:
let a = the original amt
the equation
a = (.40a+13) + (.70(a - (.40a+13)) + 68) + 126 
a = (.40a+13) + (.70(a - .40a  - 13)) + 68) + 126
 a = (.40a+13) + (.70(.6a - 13)) + 68) + 126
 a = (.40a+13) + (.42a  - 9.1) + 68 + 126 
 a = .40a + .42a + 13 - 9.1 + 68 + 126 
 a = .82a + 197.9
 a - .82a = 197.9
.18a = 197.9
 a = 197.9/.18
 a = $1099.44 he had at first