Question

tìm x ,biết :

2- ( -x + 4 ) = (-2) (-3) +4.

Answer 1

\(2-\left(-x+4\right)=\left(-2\right)\left(-3\right)+4\)

\(2-\left(-x+4\right)=10\)

\(-x+4=2-10\)

\(-x+4=-8\)

\(-x=-8-4\)

\(-x=-12\)

\(=>x=12\)

Answer 2

2 - ( -x + 4 ) = (-2) . (-3) + 4

2 - ( -x + 4 ) = 6 + 4

2 - ( -x + 4 ) = 10

          -x + 4 = 2 - 10

          -x + 4 = -8

                -x = -8 - 4

                -x = -12

    Vì -x = -12 nên x = 12.