Question

Resolva os sistemas abaixo:
a) x+y=250
x-y=32
b)x-2y=-4
x-y=4
POR FAVOR !!

Answer 1

a) x=32+y

x+y=250
(32+y) +y=250
32+y+y=250
+y+y=250-32
2y=218
y=106

x=32+y
x=32+(106)
x=138

b)x=4+y
x-2y=-4
(4+y)-2y=4
-y=8(-1)
y=-8

x=4+y
x=4(-8)
x=-4