Question

determine a medida de x e y
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Answer 1

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$\boxed{\begin{array}{c}\sf{Per\acute{i}metro~\acute{e}~a~soma~das~medidas~de~todos~lados}\end{array}}$

$\sf{x+x+x+x+y+y=39}\\\sf{4x+2y=39}\\\sf{y=60\%~de~x}\\\sf{y=0,6x}\\\sf{4x+2\cdot0,6x=39}\\\sf{4x+1,2x=39}\\\sf{5,2x=39}\\\sf{x=\dfrac{39}{5,2}}\\\sf{x=7,5}\\\sf{y=0,6\cdot7,5}\\\sf{y=4,5}$