Question:
If $\vec{a}=x \hat{i}+2 \hat{j}-z \hat{k}$ 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:
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