Question

Joe collected 94 stamps altogether. He collected 27 in April and 34 in May. How many did he collect in June?

Answer 1

If Joe collected 94 stamps which are in April May and June, we could make an equation like this: A + M + J = All stamps

Plug in the values:
$27 + 34 + j = 94$
Isolate J:
$j = 94 - 27 - 34$
Combine like terms:
$j = 33$
He collected 33 stamps in June.