Question

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Answer 1

Step-by-step explanation:

since, triangle ABC is congruent to triangle DEF

it means that AB = DE,

BC = EF,

and CA = FD

henceforth, AB = DE = 7

that is (3x -2)= 7

or, 3x = 7+2 = 9

or, x = 9/3

answer x = 3 units.