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Answered

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Spikey sold 4 less than 7 times as many cookies as shorty did. But they sold 140 cookies. How many cookies did spikey sell?

Sagot :

KizunaHighidn

Problem Solving

Spikey sold 4 less than 7 times as many cookies as Shorty did. But they sold 140 cookies. How many cookies did Spikey sell?

Solution

Let the question represent as this equation.

  • 7x - 4 (the number of cookies Spikey sold)
  • x (the number of cookies Shorty sold)
  • 140 (the total number of cookies sold)

(7x - 4) + x = 140

Solve for the value of x

(7x - 4) + x = 140

8x - 4 = 140

8x = 140 + 4

8x = 144

8x / 8 = 144 / 8

x = 18

Substitute the values to the given

Let x = 18

7x - 4 (the number of cookies Spikey sold)

7(18) - 4

126 - 4

= 122 (the number of cookies Spikey sold)

Checking

Let x = 18

(7x - 4) + x = 140

(7(18) - 4) + 18 = 140

(126 - 4) + 18 = 140

122 + 18 = 140

140 = 140 ✓

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