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March 29, 2015

March 29, 2015

Posted by **Haylie** on Thursday, February 23, 2012 at 6:23pm.

x=y-4

Please help me solve each system of equations and show your work thanks

- Math -
**Reiny**, Thursday, February 23, 2012 at 7:04pmuse substitution, sub the 2nd into the 1st

x+y = 20

(y-4) + y = 20

2y = 24

y = 12

back into x = y-4

x = 12-4 = 8

x = 8, y = 12

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