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telo118 [61]
2 years ago
7

Write an expression that can be used to check the quotient of 646 ÷ 3

Mathematics
2 answers:
Sindrei [870]2 years ago
8 0
Use the inverse operation
S_A_V [24]2 years ago
5 0
3 times x equals to 646
3x=646

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Answer:

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Step-by-step explanation:

Let x be the number of 10c coins; let y be the number of 5c coins. The total is $2.25, so the amount of 10c and 5c coins will add to that. Simita has 25 coins, so x and y, the number of coins, will have to add to 25. Hence, solve the simultaneous equation.

10x + 5y = 225 (1) - times by 0

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10x + 5y = 225 (1)

5x + 5y = 125 (2)

Then, take equation 2 away from equation 1.

5x = 100

x = 20

Substitute x back into the original equation.

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