santosmanuele19 18/04/2022 1) a - b = 5 a/b = 5/3 => a = 5b/35b/3 - b = 5 => 5b - 3b =15 => 2b = 15 => b = 7,5a = 5 + b => a = 5 + 7,5 = 12,5ab = 93,752) 25 ( x + 3 ) = 30x => 25x + 75 = 30x => 5x = 75 => x = 15 15 + 3 = 18 . 25,00 = 450,00resposta: d
santosmanuele19
1) a - b = 5
a/b = 5/3 => a = 5b/3
5b/3 - b = 5 => 5b - 3b =15 => 2b = 15 => b = 7,5
a = 5 + b => a = 5 + 7,5 = 12,5
ab = 93,75
2) 25 ( x + 3 ) = 30x => 25x + 75 = 30x => 5x = 75 => x = 15
15 + 3 = 18 . 25,00 = 450,00
resposta: d