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TiliK225 [7]
2 years ago
12

Write an equation to help you find the value of each variable. Solve the equation.

Mathematics
1 answer:
Travka [436]2 years ago
5 0

Answer:

C = 72

E = 500

Step-by-step explanation:

Is means equals  and of means multiply

a) 60% of C is 43.2

.60 *c = 43.2

Divide each side by .60

c = 43.2 / .6

C =72

b) 38% of E is 190

.38 *E = 190

Divide each side by .38

E = 190/.38

E =500

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Write and solve the equation and then check your answer. Which statements are true about the equation and its solution? Check
ch4aika [34]

The correct equation is n - 31 = 52

To check the solution, substitute 83 for the variable in the equation

This is an addition problem.

To solve the equation, add 31 to both sides.

Step-by-step explanation:

A number decreased by thirty-one is fifty-two

That means:

  • Subtract 31 from a number
  • The difference equal 52

Assume that the number is n

∵ The number is n

∵ When n decreased by 31 the answer is 52

∴ The equation is n - 31 = 52

The correct equation is n - 31 = 52

∵ n - 31 = 52

- To find n add 31 to both sides of the equation

∴ n - 31 + 31 = 52 + 31 ⇒ addition property

∴ n = 83

-To check the equation substitute n by 83 in the left hand side, the

  answer must be equal the right hand side

∵ Left hand side = 83 - 31 = 52

∵ Right hand side = 52

∴ n = 83 is correct answer

To check the solution, substitute 83 for the variable in the equation

This is an addition problem.

To solve the equation, add 31 to both sides.

Learn more:

You can learn more about solving equation in one variable in brainly.com/question/11306893

#LearnwithBrainly

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