Question

Este oare numărul 1/2 soluția ecuatiei:1,5+x=2;2x-3=-2; (2x+1/3):4=1/3; 7,2:x=3,6?

Answer 1

Salut !

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Answer 2

a)

$1.5 + x = 2$

$x = \frac{4}{2} - \frac{3}{2}$

$x = \frac{1}{2}$

Adevarat

b)

$2x - 3 = - 2$

$2x = - 2 + 3 = 1$

$x = \frac{1}{2}$

Adevarat

c)

$(2x + \frac{1}{3} ) \div \frac{1}{4} = \frac{1}{3}$

$(2x + \frac{1}{3} ) \times 4 = \frac{1}{3}$

$8 x+ \frac{4}{3} = \frac{1}{3}$

$8x = - 1$

$x = - \frac{1}{8}$

Fals

d)

$\frac{36}{5} \times \frac{1}{x} = 3.6$

$\frac{36}{5x} = \frac{36}{10}$

$5x = 10$

$x = 2$

Fals