Question

423 a/2 b/2-77 a/2 b/2

gente me ajude rápido
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Answer 1

423 a/2 b/2 - 77 a/2 b/2

= (423 - 77) a/2 b/2

= 346 a/2 b/2 = 346/4 ab

= 173 ab/2