Question

Nu ştiu exercițiul ăsta

Answer 1

2·{12+3·[60-3·(27-4·3)]}-5x=7⇔2·[12+3·(60-3·15)]-5x=7⇔2·(12+3·15)-5x=7⇔2·57-5x=7⇔114-5x=7⇒5x=114-7=107⇒x=107/5=21,4

Answer 2

$2*\{12+3*[60-3*(27-4*3)]\}-5x=7$
$2*\{12+3*[60-3*(27-12)]\}-5x=7$
$2*\{12+3*[60-3*15]\}-5x=7$
$2*\{12+3*[60-45]\}-5x=7$
$2*\{12+3*15\}-5x=7$
$2*\{12+45\}-5x=7$
$2*57-5x=7$
$114-5x=7$
$114-7=5x$
$107=5x$
$x= \frac{107}{5}$
$\bold{x=21,4}$