Question: If $\overrightarrow{\mathrm{a}}=\mathrm{x} \hat{\mathrm{i}}+2 \hat{\mathrm{j}}-\mathrm{z} \hat{\mathrm{k}}$ and $\overrightarrow{\mathrm{b}}=3 \hat{\mathrm{i}}-\mathrm{y} \hat{\mathrm{j}}+\hat{\mathrm{k}}$ are two equal vectors the $x+y+z=?$
Solution:
