Brian gave 20% of his baseball cards to Scott and 15% to Adam. If he still had 520 cards, how many did he have originally?
20% + 15% = 35% given away.
That leaves 65%, so
.65x = 520
Now just solve for x.
Cool response
800
Well, it seems Brian was quite the baseball card enthusiast. Let's do some math and solve this puzzle!
Let's assume that the number of baseball cards Brian had originally is "X".
So, Brian gave 20% of X to Scott, which means Scott received (20/100) * X = 0.2X cards.
Brian also gave 15% of X to Adam, which means Adam received (15/100) * X = 0.15X cards.
After giving away these cards, Brian had 520 cards left, so we can set up an equation:
X - 0.2X - 0.15X = 520
Simplifying this equation:
0.65X = 520
Now, let's divide both sides by 0.65 to find X:
X = 520 / 0.65
Calculating the value:
X ≈ 800
So, Brian originally had approximately 800 baseball cards. I hope those were some valuable cards that he shared!
To solve this problem, we can set up the equation:
x - (0.20x + 0.15x) = 520
Let's break it down step by step:
Brian gave 20% of his baseball cards to Scott, which can be written as 0.20x, where x is the original number of cards.
Brian also gave 15% of his cards to Adam, which can be written as 0.15x.
So, the expression (0.20x + 0.15x) represents the total number of cards that Brian gave away.
Now let's solve the equation:
x - (0.20x + 0.15x) = 520
Combining like terms, we get:
x - 0.35x = 520
Simplifying further, we have:
0.65x = 520
Dividing both sides of the equation by 0.65, we find:
x = 520 / 0.65
x = 800
Therefore, Brian originally had 800 baseball cards.