3 years ago

Solve this System of equation 3c+6d=18 6c-2d=22

Mathematics

1 answer:

olga55 [171]3 years ago

7 0

Answer:

$3x + 6y = 18 \: \: \: \\ + \\ 3 \times (6x - 2y = 22) \: \: \: 18x - 6y = 66 \\ \\ 21x = 84 \\ x = \frac{84}{21} = 4$

c=x=4

d=(18-3×4)÷6=6÷6=1=y

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