Justify each step in solving the equation 4x=7(x-3) by writing a reason for each statement. statement reason 1. 4x=7(x-3) 1. given 2. 4x=7x-21 2. 3. -3x=-21 3. 4. x=7 4.

1. 4x = 7(x - 3)   GIVEN

4x = (7)(x) + (7)(-3)

2. 4x = 7x - 21     DISTRIBUTIVE PROPERTY

4x - 7x = 7x - 7x - 21

3. -3x = -21    SUBTRACTION PROPERTY OF EQUALITY

-3x : (-3) = -21 : (-3)

4. x = 7      DIVISION PROPERTY OF EQUALITY

v = 1/3 a^2h

step-by-step explanation:

the volume is 1/3 a^2h.

it is 28 degrees colder in detroit than philadelphia.

step-by-step explanation:

what number adds to 21

-7 + ? = 21

-7 + 28 = 21

hope it