noticing the tickmarks on the sides of the triangle, meaning all sides are equal, thus is an equilateral triangle, where all angles are 60° each. So
[tex]\bf 7x+4=60\implies 7x=56\implies x=\cfrac{56}{7}\implies x=8 \\\\\\ 8y+12=60\implies 8y=48\implies y=\cfrac{48}{8}\implies y=6[/tex]
