What is the justification for the step taken from line 2 to line 3?
.
.
.
a) the subtraction property of equality
b) the multiplication property of equality
c) combining like terms on one side of the equation
d) the distributive property

Option A.

Step-by-step explanation:

We will write all the justifications for each step

Step 1 to step 2.

3x + 9 - 7x = x + 10 + x

-4x + 9 = 2x + 10

combining like terms on each side of the equation.

Step 2 to step 3.

-4x + 9 = 2x + 10

-6x + 9 = 10

Here [-4x - 2x + 9 = 2x - 2x + 10]

So, the subtraction property of equality is the justification.

Step 3 to step 4.

-6x + 9 = 10

-6x = 1

Here [ -6x + 9 - 9 = 10 - 9]

So subtraction property of the equality is followed.

Step 4 to step 5.

x = -

here [ ]

Division property of equality

Therefore, Option A. is true for the step 2 to step 3.

853.3

step-by-step explanation:

well what did you do it matters what you did : )

step-by-step explanation: