Question

Mă puteţi ajuta la aceste 3 ecuaţii?
$5x \leq 20,5$
$3(x+2,4)\ \textless \ 14,1$
$2x+4,6\ \textgreater \ 10$

Answer 1

1. x≤4,1=>x∈(-∞;4,1] 2. 3x+7,2<14,1 3x<6,9 x<2,3=>x∈(-∞;2,3) 3. 2x>5,4 x>2,7=>x∈(2,7;+∞)

Answer 2

5x≤20.5⇒x≤20.5/5⇒x≤4.1
3(x+2.4)<14.1⇒
3x+7.2<14.1⇒
3x<14.1-7.2⇒
3x<6.9⇒x<6.9/3⇒x<2.3
2x+4.6.>10⇒2x>10-4.6⇒2x>5.4⇒x>5.4/2⇒x>2.7
sucees