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Triss [41]
2 years ago
7

X=3y+10 x=-8y-12 can u guys help me find the steps to solve this equations

Mathematics
1 answer:
Natalija [7]2 years ago
8 0

Answer:

x=4, y=-2

Step-by-step explanation:

x = 3y + 10 \\ x =  - 8y -12\\ now \\ 3y  + 10 =  - 8y - 12 \\ 3y + 8y =  - 12 - 10 \\ 11y =  - 22 \\ y =  \frac{ - 22}{11}  \\ y =  - 2 \\ again \: putting \: the \: value \:of \: y \\ x = 3y + 10 \\ x = 3( - 2) + 10 \\ x =  - 6 + 10 \\ x = 4

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Offer B is the best value for money because each kg cost is £0.61 and in offer 'A' each kg cost is £0.7.

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