Answer: 26
Explanation:
This is a very typical algebra question that you will encounter in your primary level of math.
If we assume(or make a promise) that the same shapes always have identical values, we can think it in this way:
3 Triangle makes 33, then 6 would make 66, and in this context, each triangle will hold a value of 11.
In similar context, let me simply this for you.
Let triangle be T,
circle be C,
and green triangle be G.
Given
T + T + T = 33
T + C + C = 21
C + 2G + 2G = 17,
T + T + T = 33, therefore T = 11.
T + C + C = 21,
11 + C + C = 21,
C + C = 10, therefore C = 5
since C + 2G + 2G =17,
4G + 5 = 17,
4G = 12, and therefore G = 3
Now the question is asking for
T + C x G
in math, we always prioritize multiplication and division unless there's a bracket, and therefore if we plug in the values we got for each symbols,
11 + 5 x 3 = 11 + 15
which will give us the final value of 26.