Question

a)x+y=22
x-y=8

B)2x+y=26
x-y=4

C)3x+2y=5
5x-2y=1

D)x+2y=-4
3x-2y=20

Answer 1

a) 2x=30

x=30/2

x=15

Resposta:

b) 3x=30

x=30/4

x=7,5

c)8x=6

x=6/8

x=3/4

d)4x=16

x=16/4

x=4