\( x \) is an Write o

i) \( 2+7 \cdot m=32-3 \cdot m \) j) \( 4 \cdot(y+2)+21-3 \cdot y=6 \cdot(y+3) \) k) \( \sqrt{3 \cdot x+16}=5 \) l) \( 7 \cdot a+8 \cdot a-7=5 \cdot a+13 \)

Solve for \( j \) \[ \begin{array}{l}\frac{j}{3}+10=12 \\ j=\square\end{array} \]

5) \( \frac{1}{4}+\frac{1}{6}-\frac{1}{3} \)

\( \sqrt {34-(-5)^{2}}-(-2)\frac{3}{}\div (-4) \)

Compare: The value of the 7 in 5,073 is than the value of the 7 in 18,749 .