Răspuns :
a)[tex]x-3 = -8\\x = -5[/tex]
b) [tex]2x+4 = -20 - x\\3x = -24\\x = -8[/tex]
c) [tex] -4x = 36 \\ x = \frac{36}{-4} = -9[/tex]
d) [tex] \frac{x}{-3} = -1 \\ x = (-1)\cdot (-3) = 3[/tex]
e) [tex] \frac{18}{-x} = -9\\ 18 = (-9)\cdot (-x) = 9x\\ x = \frac{18}{9} = 2[/tex]
Răspuns:
Explicație pas cu pas:
a) x - 3 = - 8
x = - 8 + 3
x = - 5
_____________
b) 2 x + 4 = - 20 - x
2 x + x = - 20 - 4
3 x = - 24
x = ( - 24 ) : 3
x = - 8
__________________
c) - 4 x = 36
x = 36 : ( - 4 )
x = - 9
___________________
d) x : ( - 3 ) = - 1
x = ( - 1 ) × ( - 3 )
x = 3
________________
e) 18 : ( - x ) = - 9
- x = 18 : ( - 9 )
- x = - 2
x = 2
_______________