emilykanderson emilykanderson

02-07-2016
Mathematics

contestada

5x + 10y = 18
x = y - 6
Which of the following equations is the result of substituting y - 6 in for x in the first equation?

5x + 10y - 6 = 18
5y - 6 + 10y = 18
5y - 30 + 10y = 18

Respuesta :

texaschic101 texaschic101

02-07-2016

5y - 30 + 10y = 18 <== ur answer

Answer Link

olemakpadu olemakpadu

02-07-2016

5x + 10y = 18

x = y -6, we substitute this into first equation.

5x + 10y = 18

5*(y - 6) + 10y = 18

5y - 30 + 10y = 18

So it the last option from the top.

Answer Link

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