The sum of two numbers is 12 the difference of them is 4 what are the two numbers?x=first number y= second number

Step-by-step explanation:

               x + y = 12   (i)

              x - y = 4 (ii)

add,         2x = 16

                  x = 16/2

                   x = 8

Put x = 8 in (i)

  8 + y = 12

        y = 12 - 8

        y = 4

25% is the answer

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w