Question

Fill in the blank

$\begin{array}{ccc}14& 4& \left(30\right)\\ 8& 12& \left(22\right)\\ 19& 14& (-)\end{array}$

Answer 1

The third number in each row is the sum of twice the first number and half the second number.
Formula : $2a+\frac{1}{2}b=c$
$(14\times 2)+(4÷2)=28+2=30$
$(8\times 2)+(12÷2)=16+6=22$
$(19\times 2)+(14÷2)=38+7=45$