Your answer will be option B "+29 + +18." Equivalent means the same amount and according to the rules of KCC (Keep Change Change) +18 - -29 will convert into +18 + +29 which would equal 47 which is equivalent to option B.
![+18 -29](https://img.qammunity.org/2020/formulas/mathematics/middle-school/uxaiyma677tomwlfm15i5j9uzrax6wyto9.png)
![KCC=18+29](https://img.qammunity.org/2020/formulas/mathematics/middle-school/tz4qduk8rgz21ane2djhrzzqi3ewykiopg.png)
![18+29=47](https://img.qammunity.org/2020/formulas/mathematics/middle-school/3d2o20rli0pzc3gm3zr26w817obrda5zkj.png)
Option A -18 + 18 = 0
Option B +29 + +18 = 47
Option C -18 - +29 = -18 + -29 = -47
Option D -29 - -18 = -29 + 18 = -11
Therefore your answer is option B.
Hope this helps.