Question

Resolva o sistema de equações 9x - 2y = 0 x+y= 44

Answer 1

$\large\boxed{\begin{array}{l}\begin{cases}\sf 9x-2y=0\\\sf x+y=44\end{cases}\\\\\begin{cases}\sf 9x-2y=0\\\sf y=44-x\end{cases}\\\sf 9x-2\cdot(44-x)=0\\\sf 9x-88+2x=0\\\sf 11x=88\\\sf x=\dfrac{88}{11}\\\sf x=8\\\sf y=44-x\\\sf y=44-8\\\sf y=36\\\sf S=\{8,36\}\end{array}}$