x-y=16
x+y=74
2006-09-10 10:26:28 · 11 respostas · perguntado por ta15 2 em Ciências e Matemática ➔ Matemática
x-y=16
x+y=74
2x=90
x=90/2=45
x-y=16
45-y=16
-y=16-45
-y=-29(-1)
y=29
2006-09-10 11:39:11 · answer #1 · answered by AllCant 2 · 0⤊ 0⤋
x=45
y=29
2006-09-11 08:33:52 · answer #2 · answered by Anonymous · 0⤊ 0⤋
( x - y = 16
(x + y = 74
--------------
2x = 90
x = 90 : 2
x = 45
x - y = 16 ==> 45 - y = 16 ==> 45 - 16 = y ==> 29 = y
x = 45; y = 29
2006-09-10 19:20:46 · answer #3 · answered by aeiou 7 · 0⤊ 0⤋
x-y=16 -->1
x+y=74 --> 2
De 2, x=74-y -->3
Substituindo 3 em 1: 74-y-y=16
Portatanto, -2y=-16+74=-58
Divide-se os 2 lados por -2, então, y=29
Substituindo y=29 em 1: x-29=16
Então, x =16+29=45
Resposta: (45;29) ou x=45 e y=29.
Beijos.
2006-09-10 18:13:13 · answer #4 · answered by Flá P* 2 · 0⤊ 0⤋
Muto fácil.
2006-09-10 18:04:05 · answer #5 · answered by Anonymous · 0⤊ 0⤋
x=45
y=29
2006-09-10 17:32:23 · answer #6 · answered by Thyago 4 · 1⤊ 1⤋
x=45
y=29
2006-09-10 17:29:48 · answer #7 · answered by Anonymous · 1⤊ 1⤋
X= 45
Y= 29
2006-09-10 17:46:17 · answer #8 · answered by terapeutaoriental5elementos 1 · 0⤊ 1⤋
58
2006-09-10 17:42:46 · answer #9 · answered by jon69 1 · 0⤊ 1⤋
tenho a mínima idéia
2006-09-10 17:32:21 · answer #10 · answered by namag 3 · 0⤊ 1⤋