Math

Solve 2x - 5y = 63 and - 2x - 5y = 27

Asked by AnneS2 on 14 Jul 08:42

Last updated by anonymous on 15 Jul 22:57

1 Answers

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Answered by CherieS on 15 Jul 22:57

2x - 5y = 63

2x - 5y+5y = 63+5y

2x= 63+5y

2x/2= 63+5y/2

x=31.5+2.5y

- 2x - 5y = 27

- 2(31.5+2.5y) - 5y = 27

- 2(31.5) (-2)(+2.5y) - 5y = 27

-63-5y- 5y = 27

-63-10y= 27

-63-10y+63= 27+63

-10y=90

-10y/-10=90/-10

y=-9

x=31.5+2.5y

x=31.5+2.5(-9)

x=31.5-22.5=-9