Respuesta :

clarch19

Answer:

x = 13

Step-by-step explanation:

ΔRST≈ΔYSZ

therefore:

RT/ST = YZ/SZ

(3x-7)/40 = (2x+2)/35

cross-multiply:

40(2x+2) = 35(3x-7)

80x+80 = 105x-245

80 = 25x-245

325 = 25x

325/25 = x

x = 13

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