Question

se A= 3B determine o valor de A e B sabendo que A+B= 132

Answer 1

$\left \{ {{A=3B} \atop {A+B=132}} \right. =\ \textgreater \ \left \{ {{A-3B(-1)} \atop {A+B=132}} \right. \\\\ \left \{ {{-A+3B=0} \atop {A+B=132}} \right.\\\\3B+B=132+0\\4B=132\\B= \frac{132}{4}\\\\\boxed{\boxed{B=33}}\\\\\\A=3B\\A=3\cdot33\\\\\boxed{\boxed{A=99}}$