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20-10-2014
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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mariamikayla mariamikayla

20-10-2014

[tex]4x+8y=40 \ |:4 \\\\ x+2y=10 \\\\ x+2*0.8=10 \\\\ x+1.6=10 \\\\ x=10-1.6 \\\\ \boxed{x= 8.4}[/tex]

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