Question

7x + 6y = 71,5x+4y=49 solvev this substituting and elimination method ​

Answer 1

Answer:

$x = 5 \\ y = 6$

Step-by-step explanation:

$7x + 6y = 71 \\ 5x + 4y = 49 \\ \\ 7x + 6y = 71 \times 4 \\ 5x + 4y = 49 \times 6 \\ \\ 28x + 24y = 284 \\ 30x + 24y = 294 \\ \\ - 2x = - 10 \\ x = 5 \\ value \: of \: x \: put \: in \: eqation \: 1 \\ 28x + 24y = 284 \\ 28 \times 5 + 24y = 284 \\ 140 + 24y = 284 \\ 24y = 284 - 140 \\ 24y = 144 \\ y = \frac{144}{24 } \\ y = 6$

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Answer 2

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