Given the equation 5 + x -12 = 2x - 7.

part a. solve the equation 5 + x - 12 = 2x - 7. in your final answer, be sure to state the solution and include all of your work.

part b. use the values x = -0.5,0,1 to prove your solution to the equation 5 + x - 12 = 2x - 7 . in your final answer, include all of your calculations.

a) 5 + x -12 = 2x - 7.

    x - 7 = 2x - 7

    -x = 0

b) x = -0.5

5 + x - 12 = 2x - 7

5 - 0.5   - 12 = 2(-0.5) - 7

-7.5 = -1 -7

-7.5 = -8     false

x = 0

5 + x - 12 = 2x - 7

5 + 0 -12 = 2(0) - 7

-7 = 2(0) - 7

-7 = -7     true

x = 1

5 + x - 12 = 2x - 7

5 + 1 - 12 = 2(1) - 7

-6 = 2(1) - 7

-6 = 2 - 7

-6 = -5   false

hope this ! ; )

$20.01

step-by-step explanation:

the sale price is (1.00 - 0.77)($87), or 0.23($87), or $20.01.

i think it is c, not positive though

step-by-step explanation: