Answer: 14
Step-by-step explanation:
All we need to do is to find x
x + (2x - 6) = 36
we expand the bracket first,
x + 2x - 6 = 36
Then we collect the like terms;
x + 2x = 36 + 6
3x = 42
We divide bothside of the equation by 3 to get our x
3x/3 = 42/3
x = 14
Therefore Aleera is having 14 baseball cards.