Question

15 - (7 - 3x )=x - 10

Answer 1

15-7+3x=x-10

=>3x-x=-10+7-15

=>2x=-18

=>x=-9

Answer 2

\(15-\left(7-3x\right)=x-10\)

\(\Rightarrow3x-x=7-10-15\)

\(\Rightarrow2x=-18\Rightarrow x=-9\)

Answer 3

15 - (7 - 3x) = x - 10

=> 15 - 7 + 3x = x - 10

=> 15 - 7 + 10 = -3x + x

=> 18 = -2

=> x = -18 : 2

=> x =-9

Answer 4

15-(7-3x)=x-10

\(\Rightarrow\)15-7+3x=x-10

\(\Rightarrow\)8+3x=x-10

\(\Rightarrow\)x-3x=8+10

\(\Rightarrow\)-2x=18

\(\Rightarrow\)x=18:(-2)=-9

vậy x=-9

Answer 5

15 - (7 - 3x ) = x - 10

15 - 7 + 3x = x - 10

2x + 15 - 7 + 10=0

2x + 18 = 0

2x = -18

x = -9

Answer 6

\(15-\left(7-3x\right)=x-10\)

=> \(15-7-3x=x-10\)

=> \(-3x-x=-15+7-10\)

=> \(-4x=-18\)

=> \(x=\frac{-18}{-4}\)

=> \(x=\frac{9}{2}\)