Question

Determine x e y de modo que os pares ordenados seja iguais
a)(1/4x,3/2y) = (2,1/5)
b)(2x, 30) = (1/4,5y)
c)(x^2 + x, y^2) = (0,100)​

Answer 1

a) 1/4 • x = 2

x = 2 / (1/4)

x = 2 • 4/1

x = 8

3/2 • y = 1/5

y = (1/5) / (3/2)

y = 1/5 • 2/3

y = 2/15

b) 2x = 1/4

x = (1/4)/2

x = 1/8

5y = 30

y = 30/5

y = 6

c) x²+x = 0

x(x+1) = 0

x = 0 ou -1

y² = 100

y = √100

y = 10