24-08-2017
Mathematics

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What is the value of x in the equation 4x + 8y =40 when y =0.8

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24-08-2017

y = 0.8

4x + 8y = 40

4x + 8*(0.8) = 40

4x + 6.4 = 40

4x = 40 - 6.4

4x = 33.6

x = 8.4

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