Question

Rezolvati in multimea nr reale ecuatiile
a.2√7x=6√7
b.28:x=10

Answer 1

a) x = 6 sqrt(7) / 2 sqrt(7) = 3
b) x = 28 / 10 = 2.8

Coroana?

Answer 2

$a) 2 \sqrt{7}x= 6\sqrt{7}\Big{|}: \sqrt{7} \Rightarrow 2x = 6 \Rightarrow x = 3 \\ \\ b) 28:x=10 \Rightarrow \frac{28}{x} = 10 \Rightarrow 10x = 28 \Rightarrow x = 2,8$