Question

Tìm x biết:

a) x-3= -6

b) x-5 = -12+7

c) x+(-3)=14-51

d) - x-30=(-27)+6

giải chi tiết giúp mình ạ!

Answer 1

\(a,x-3=-6\)
\(x=-6+3\)
\(x=-3\)
Vậy \(x=-3\)
__________________
\(b,x-5=-12+7\)
\(x-5=-5\)
\(x=0\)
Vậy \(x=0\)
___________________
\(c,x+\left(-3\right)=14-51\)
\(x-3=-37\)
\(x=-34\)
Vậy \(x=-34\)
______________________
\(d,-x-30=-27+6\)
\(-x-30=-21\)
\(-x=9\)
Vậy \(x=-9\)

Answer 2

\(a,x-3=-6\\ x=-6+3\\ x=-3\\ b,x-5=-12+7\\ x-5=-5\\ x=-5+5\\ x=0\\ c,x+\left(-3\right)=14-51\\ x+\left(-3\right)=-37\\ x=-37-\left(-3\right)\\ x=\left(-34\right)\\ d,-x-30=\left(-27\right)+6\\ -x-30=-21\\ -x=-21+30\\-x=9\\ x=-9 \)

Answer 3

a) x = -6 +3

    x = -3

b) x - 5 = -5

     x      = -5 + 5

     x      = 0

c) x + (-3) = -37

    x            = -37 + 3

    x            = -34

d) -x - 30 = -21

     -x        = -21 + 30

     -x        = 9