Answered

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Solve the system:
c+12d=-66
-4c+3d=-42

Sagot :

Answer: c=6, d=-6

Step-by-step explanation:

c+12d=-66

-4c+3d=-42

(-4c+3d=-42)*4

-16c+12d=-168      ==> subtract this

c+12d=-66           ==> by this

-17c=-168-(-66)       ==> subtract the top two equations

-17c=-168+66

-17c=-102

c=6

c+12d=-66

6+12d=-66

12d=-72

d=-6

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