Please can any one solve the simultaneous equation ​

Eliminating c first is easiest:

• adding equations 1 and 2 together gives

(4g + 12f - c) + (10g - 14f + c) = 40 + (-74)

14g - 2f = -34

[7g - f = -17]

• adding equations 1 and 3 together gives

(4g + 12f - c) + (12g + c) = 40 + (-36)

16g + 12f = 4

[4g + 3f = 1]

Multiply the first equation wrapped in [] above by 3, then add it to the other one. This eliminates f :

3 (7g - f ) + (4g + 3f ) = 3 (-17) + 1

(21g - 3f ) + (4g + 3f ) = -51 + 1

25g = -50

Solve for g :

g = -2

Plug this into the first equation in [] and solve for f :

7 (-2) - f = -17

-14 - f = -17

f = 3

Plug these both into any of the original 3 equations. The third one has no f term, so that's simplest. Solve for c :

12 (-2) + c = -36

-24 + c = -36

c = -12

13.46

step-by-step explanation:

16.80 x .20 = 13.46

step-by-step explanation:

the answer is 89 d

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