Question

Exercitiul 3, punctele c) si e)

Answer 1

c)x/3+4/15=1(amplificam sa obtinem numitorul 15 peste tot)
5x/15 +4/15=15/15/-4/15
5x/15=11/15
5x=11/:5
x=11/5=2,2

e)x/10 - 2 1/2=x/5 -2
x/10-5/2=x/5 -2 (amplificam sa obtinem numitorul 10 peste tot)
x/10-25/10=2x/10-20/10
-x/10 =5/10
-x=5/:(-1)
x=-5