Question

-12(x-5)+7(3-x)=5

GIÚP MK VỚI SẮP NỘP RỒI ĐÚNG MK TK CHO 2-3 CÁI NHOA!

Answer 1

\(-12(x-5)+7(3-x)=5\)

\(\Rightarrow-12x-60+21-7x=5\)

\(\Rightarrow-12x-7x-60+21=5\)

\(\Rightarrow-12x-7x-81=5\)

\(\Rightarrow-19x-81=5\)

\(\Rightarrow81-19x=5\)

\(\Rightarrow-19x=-76\)

\(\Rightarrow x=4\)

Answer 2

-12(x-5)+7(3-x)=5

-12x-(-12.5)+7.3-7x=5

-12x-(-60)+21-7x=5

-12x-(-60)+21=5+7x

-12x-(-60)=5+7x-21

-12x=5+7x-21+(-60)

-12x-7x=5-21+(-60)

-19x=-76

  x=-76:(-19)

  x=4

          vậy x=4

Answer 3

-12 ( x - 5 ) + 7 ( 3 - x ) = 5

-12x + 12 . 5 + 7 . 3 - 7x = 5

-12x + 60 + 21 - 7x = 5

-12x - 7x = 5 - 60 - 21

-19x = -76

x = -76 : (-19)

x = 4

Answer 4

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