Final answer:
Anthony received $340 for his birthday last year.
Step-by-step explanation:
Let's represent the amount Anthony received last year as x. According to the question, this year he received $20 less than half of last year's amount. So we can set up the equation:
150 = (1/2)x - 20
To solve for x, we can add 20 to both sides:
170 = (1/2)x
Now, multiply both sides by 2 to cancel out the fraction:
2 * 170 = x
x = 340
Therefore, Anthony received $340 for his birthday last year.