sophssands02
sophssands02 sophssands02
  • 08-02-2018
  • Mathematics
contestada

Solve by substitution
4x + 7y = 1
y = -2x-7

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musiclover10045
musiclover10045 musiclover10045
  • 08-02-2018

4x + 7y = 1

y = -2x-7


4x+7(-2x-7) = 1

4x-14x-49 = 1

-10x - 49 =1

-10x = 50

x = -5


y = -2(-5)-7

y = 10-7

y = 3


(-5,3)

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