Question

13,5-x+5,4=3,42

5,1-13,8+x=1,8

Answer 1

\(13,5-x+5,4=3,42\)
\(x=13,5-\left(3,42-5,4\right)\)
\(x=13,5-3,42+5,4\)
\(x=15,48\)
\(---------\)
\(5,1-13,8+x=1,8\)
\(13,8+x=3,3\)
\(x=-10,5\)

Answer 2

A.13,5 - X = - 1,98

x = 15,48 

B. -8,7 + X = 1,8 

x = 10,5

Answer 3

13,5 - x + 5,4 = 3,42 

=> - x = 3,42 - 5,4 -13,5 

=> - x = -15,48

=> x = 15,48 

5,1 - 13,8 + x = 1,8

=> x = 1,8 - 5,1 + 13,8 

=> x = 10,5 

Answer 4

$13,5-x+5,4=3,42$
$x=13,5-\left(3,42-5,4\right)$
$x=13,5-3,42+5,4$
$x=15,48$
$---------$
$5,1-13,8+x=1,8$
$13,8+x=3,3$
$x=-10,5$