Respuestas
g. • 2x = y+10
• y+10 = 3x-20
* 2x = 3x-20 * 2x = y+10
20 = x 2(20) = y+10
40-10 = y
30 = y
h. • x+2y = 92
• x+2y+4y =180
92+4y = 180
4y = 88
y = 22
Reemplazamos "y" en:
• x+2y = 92
x+2(22) = 92
x = 48
i. • 3x+2y = 130
• 3x+2y+y = 180
130+y = 180
y = 50
Reemplazamos "y" en:
• 3x+2y = 130
3x+2(50) = 130
3x = 130-100
3x = 30 → x = 10
j. • x+y = 150
x = 150-y
• x+y+x-2y = 180
150+150-y-2y = 180
300-180 = 3y
120 = 3y → y = 40
•x=150-y → x=150-40 → x=110
k. • 3x+36+5x-8 = 180
8x = 152 → x = 19
• 5x-8 = y
5(19)-8 = y → y = 87
l. • 3x-20+2x = 180
5x = 200 → x = 40
• 3x-20 = y
3(40)-20 = y → y = 100
m. • 55+40+x =180
x = 180-55+40 → x = 85
• y = 40+55 → y = 95
n. • 50 = 20+x → x = 30
• x+y = 180
30+y = 180 → y = 150
o. • x = 30
• y = 40
p. • x = 50
( Psd. La n, o, p son solo para visualizar y alargar las lineas. Ver la imagen )
![](https://es-static.z-dn.net/files/d3b/e8a363e7b8db4b8630eebe96fc53822c.jpg)
![](https://es-static.z-dn.net/files/dab/1b1a2d935a6c4b0144d9c703bdb14058.jpg)