Exercitiul 3 ( c si d ) , coronita !!!

Exercitiul 3 C Si D Coronita class=

Răspuns :

c) 7/9x - 2/3x = 2
1/9x = 2
x = 2 ÷ 1/9 = 2 × 9/1
x = 18/1
x = 18

d) -3 × (2 - 15x) = -6
2 - 15x = -6 ÷ (-3)
2 - 15x = 2
15x = 2-2
15x = 0
x = 0 ÷ 15
x = 0