Question

Please help me, I don't know what to do

Answer 1

$|-6|+3|4|+|-5|-0\cdot6=\\ 6+3\cdot4+5-0=\\ 11+12=\\ 23$

$R=x(A+B)\\ R=Ax+Bx\\ Bx=R-Ax\\ B=\frac{R-Ax}{x}$

$A=\frac{12.6\cdot42}{2}\\ A=12.6\cdot21\\ A=264,6$