Question

ex de mai jos va rog ​

Answer 1

Răspuns:

Explicație pas cu pas:

a)

1,5x = 6

x = 6 : 1,5 = 4

b)

3,2x = -16

x = -16 : 3,2 = -5

c)

x = -15 : 2.5 = -6

d)

x = -21 : 0,7 = -30

Answer 2

a)

$\it 1,5x-6=0 \Rightarrow 1,5x=6\Big|_{\cdot2} \Rightarrow 3x=12\Big|_{:3} \Rightarrow x=4$

b)

$\it 3,2x+16=0\Big|_{\cdot5} \Rightarrow 16x+16\cdot5=0\Big|_{:16} \Rightarrow x+5=0 \Rightarrow x=-5$

c)

$\it 2,5x=-15\Big|_{\cdot2} \Rightarrow 5x=-30\Big|{:5} \Rightarrow x=-6$

d)

$\it 0,7x=-21\Big|_{\cdot10} \Rightarrow 7x=-210\Big|_{:7} \Rightarrow x=-30$