Answer:
12
Step-by-step explanation:
The apple equals 7
the pear equals 13
and the pomegranate equal 6
7+6 = 13
7+7+7 = 21
7+6+13=26
6+6=12
How I came to this conclusion was starting with the problem with one variable.
3 apple =21
so 21/3 = 7
Now this is the tricky part.
7 + x = z but also, 7 + x + z =26
So I plugged 6 into x, and got 13 for z.
7 + 6 = 13, and also 7 + 6 + 13 = 26.