Question

Is Frieda’s work correct? Explain how she can check her solution.

       z + 22 = 64
z + 22 – 22 = 64 – 22 
               z = 42​

Answer 1

Answer:

by substitution

Step-by-step explanation:

To check if the solution to an equation is valid

Substitute the solution into the equation and if both sides agree then the solution is correct.

left side = z + 22 = 42 + 22 = 64 = right side

Hence z = 42 is the correct solution

Answer 2

The equation is given as:

  $z+22=64$

⇒$z+22-22=64-22$

⇒$z=42$

So, we have to put the value of z in the 1st equation then we can say whether Frieda's work is correct or not.

⇒$42+22=64$

$=RHS$

Hence, Frieda's work is correct.

What's an equation in math?

An equation is a mathematical expression that contains an equals symbol. Equations often contain algebra. Algebra is used in maths when you do not know the exact number in a calculation.

What is an equation example?

An equation is a mathematical statement that is made up of two expressions connected by an equal sign. For example, 3x – 5 = 16 is an equation. Solving this equation, we get the value of the variable x as x = 7.

Learn more about equations, refer to:

https://brainly.com/question/16450098

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