By Jessica

       x  +2(x-4)=7
       5       10

          x + 2x-8=7
          5      10

10 * (x +2x-8)=7*10
        (5      10  )

          2x+2x-8=70

                4x-8=70
                   +8  +8

                   4x=78
                    4     4
                    x=19  1/2
 

1. The problem

2.Distribute the two

3. Multiply each side by ten to get rid of the fractions.

4. Combine like terms.

5. Add eight to each side.

6. Then divide by four to get the variable by itself. Then you have the answer.

 ½ (d­_1­+d₂)=A+BT

2 ( ½)(d₁+d₂)= (A+BT)2

d₁+d₂= 2A+2BT

   -d₂                  -d₂

d₁=2A+2BT-d₂

1.             This is actually a real formula. We want to find d₁.

2.          First you multiply everything on both sides by two to get rid of the fraction.

3.      Then subtract d₂ from both sides and you are left with the answer.

With slope=3

Through (2,9)

Y_1­-Y₂=m(X₁-X₂)

Y-9=3(X-2)

1.               The problem

2.         The formula.

3.       The answer.