Question

Resolva os sistemas de equação:

a)x+y=-2
2x-y=26

b)2x+y=5
3x-y=10

c)x+y=6
x-y=2

d)2x-2y=12
x+2y=11

e)2x+2y=4
3x-2y=1

f)5x-y=7
2x+y=7

g)x+y=20
x-y=8

Answer 1

a)
X + Y = -2 +
2X- Y = 26
_________
3x = 24
x = 8

8 + Y = -2
Y = -10

b)
2X+Y = 5 +
3X-Y = 10
_________
5X= 15
X = 5

2.5 + Y = 5
Y = -5

c)
X+Y = 6
X-Y = 2
2X = 8
X= 4

4-Y= 2
Y=2