Question

Determine os numeros reais x e y:
A) (-3,y)=(x+2,3)
B) (x,4+y)=(1,3y-x)
C) (x+y,2)=(4,x-y)
D) (2x,y-2x)=(3y,3)
E) (2x+3y,12)=(13,3x+2y)

Answer 1

(a11 a12)=(b11 b12)

Temos:

a11=b11

a12=b12

Portanto:

A) (-3,y)=(x+2,3)

-3=x+2
x=-3-2
x=-5

y=3

B) (x,4+y)=(1,3y-x)

x=1

4+y=3y-x   (fazendo x=1)
4+y=3y-1
4+1=3y-y
5=2y
y=2/5

Mesma coisa para a C,D e E