Question

Maya solved an equation incorrectly, as shown below: Step 1: 4x = 28 Step 2: x = 28 − 4 Step 3: x = 24 Which statement best explains why Step 2 is incorrect in Maya's solution?

Answer 1

She needs to divide both sides of the equation by 4, and then end up with x =7

Explanation:

Got it right on flvs test, plus...

Answer 2

Only Use addition or subtraction if the unknown variable is alone and not combined with a Number .

EXPLANATION :

Given step 1 to be =

4x = 28

Following the third law,

The correct solution would have been

Divide both sides of the equation by 4

x = 7

Explanation:

"A General Rule for Solving Equations

• Simplify each side of the equation by removing parentheses and combining like terms.

• Use addition or subtraction to isolate the variable term on one side of the equation.( Note : This law can only be applies if the variable is alone e.g x and not combined e.g 4x)

• Use multiplication or division to solve for the variable" ( If variable is combined . Example : 4x