elspeth elspeth

16-01-2017
Mathematics

contestada

x+2y=13
3x-5y=6
Please help - use substitution to solve each system of equations...

Respuesta :

doodle10 doodle10

16-01-2017

Answer y = 3 and x = 7

3(13-2y) - 5y = 6
39 - 6y - 5y = 6
39 - 11y = 6
39 = 6 + 11y
33 = 11y
3 = y

So x = 7

Because x + 2x3 = 11
x = 11 - 6

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