Question

Steps for solving 5(2x – 8) = 20 are shown.Which of these is not part of the solution process? A.Using the commutative property B.Dividing both sides by 10 to isolate the variable C.Combining like terms D.Using the distributive property

Answer 1

A. using the commutative property

distribute left side of equation

10x - 40 = 20 → distributive property

add 40 to both sides

10x = 20 + 40 = 60 → combining like numeric terms

divide both sides by 10 to isolate the variable

x = $\frac{60}{10}$ = 6

Answer 2

Answer:

The option A is not a part of the solution process.

Step-by-step explanation:

Given the equation 5(2x - 8) = 20.

We have to choose the option which is not part of the solution process.

Solution process are

$5(2x - 8) = 20$

Using distributive property, a(b+c)=ab+ac

$5(2x)-5(8)=20$

⇒ $10x-40=20$

Combining like terms, we get

$10x=20+40=60$

Dividing both sides by 10 to isolate the variable

$x=\frac{60}{10}=6$

which shows that

The option A is not a part of the solution process.