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whosirmesir whosirmesir
  • 24-01-2017
  • Mathematics
Answered

use linear equation to solve this.

2x - 3y = 13

x + 2y = -4

Verified Answer :

edoud1703
edoud1703 edoud1703
  • 24-01-2017

are they separate questions or are the together?

Answer Link
broper01 broper01
  • 24-01-2017

First: Multiply Equation 2 by -2.

2x - 3y = 13
-2x - 4y = 8

Second: Add the two equations to eliminate your x factor.

-7y = 21

Third: Divide both sides by -7 to isolate x

y = -3

Fourth: Substitute your y value back into one of your prior equations to solve for x. 

x + 2(-3) = -4
x - 6 = -4
  + 6   +6
_________
x      = 2

x = 2, y = -3

Answer Link

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