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zavuch27 [327]
3 years ago
11

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

Mathematics
2 answers:
lyudmila [28]3 years ago
7 0

Answer:

Frieda's work is correct.

Step-by-step explanation:

z+22= 64 can also be z= 64-22

64-22= 42

Meaning, z= 42

42+22-22= 64-22

42= 42

Mandarinka [93]3 years ago
3 0

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

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