Question

determine o valos das incógnitas​

Answer 1

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$\sf{2x-\diagup\!\!\!\!10^{\circ}+7x+\diagup\!\!\!\! 10^{\circ})=180^{\circ}}\\\sf{9x=180^{\circ}}\\\sf{x=\dfrac{180^{\circ}}{9}}\\\sf{x=20^{\circ}}\\\sf{b=2x-10^{\circ}}\\\sf{b=2\cdot20^{\circ}-10^{\circ}=40^{\circ}-10^{\circ}=30^{\circ}}\\\sf{a=180^{\circ}-30^{\circ}=150^{\circ}}\\\sf{s=a=150^{\circ}}\\\sf{7y-10^{\circ}=y+50^{\circ}}\\\sf{7y-y=50^{\circ}+10^{\circ}}\\\sf{6y=60^{\circ}}\\\sf{y=\dfrac{60}{6}}\\\sf{y=10^{\circ}}\\\sf{r=s=150^{\circ}}$