Question

Rezolvati in multimea nr nat ecuatiilor urmâtoâre. a . ). (25x) : 5 =10. B) (2x + 3x ) :5=7. C) (45x+ 27x ) : 36=4

Answer 1

a) (25x) : 5 = 10
25x = 10*5
25x = 50
x = 50 : 25
x = 2

b) (2x + 3x) : 5 = 7
(5x) : 5 = 7
5x = 7*5
5x = 35
x = 35 : 5
x = 7

c) (45x + 27x) : 36 = 4
(72x) = 36 * 4
72x = 144
x = 144 : 72
x = 2