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Solve the following system of equations. 8x + 5y = -84 3x + y = -21 A. x = -12, y = -3 B. x = 5, y = -24.8 C. x = 12, y = -57 D. x = -3, y = -12

 Aug 20, 2015

Best Answer 

 #1
avatar+26396 
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Solve the following system of equations.

8x + 5y = -84

3x + y = -21

A. x = -12, y = -3

B. x = 5, y = -24.8

C. x = 12, y = -57

D. x = -3, y = -12

 

The answer is D. x = -3 and y = -12

(1)8x+5y=84(2)3x+y=21|5(2)15x+5y=105(2)(1)15x8x+5y5y=105(84)15x8x=105+847x=21|:7x=33x+y=213(3)+y=219+y=21y=21+9y=12

 

 Aug 21, 2015
 #1
avatar+26396 
+5
Best Answer

Solve the following system of equations.

8x + 5y = -84

3x + y = -21

A. x = -12, y = -3

B. x = 5, y = -24.8

C. x = 12, y = -57

D. x = -3, y = -12

 

The answer is D. x = -3 and y = -12

(1)8x+5y=84(2)3x+y=21|5(2)15x+5y=105(2)(1)15x8x+5y5y=105(84)15x8x=105+847x=21|:7x=33x+y=213(3)+y=219+y=21y=21+9y=12

 

heureka Aug 21, 2015

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