Question

resolva a 8 e a 9
quero para hoje
me ajundeeeeeeeem

quero as 2 ok!!!

Answer 1

angulos alternos e internos são congruentes logo

4x=2x/3+60   mmc=3

12x=2x+180

12x-2x=180

10x=180

x=18

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15x+5=10x-25

15x-10x=-25-5

5x=-30

x=6º