Level: Standard
2) Given: -2(x - 4) = 3(x + 12); Prove: x = -5.6
Statements
Reasons

Step-by-step explanation:

-2(x - 4) = 3(x + 12)          {Use distributive rule}

-2*x - 4 *(-2) = 3*x + 12*3

-2x  + 8    = 3x + 36       {add 2x to both sides}

           8  = 3x + 36 +2x

            8 = 5x + 36

     8 - 36 = 5x                 {subtract 36 from both sides}

         -28  = 5x

5x = -28           {Divide both sides by 5}

 x = -28/5

x = -5.6

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step-by-step explanation:

basically 2/5.

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solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b