Question

6x+7y-14=0 and 8x-4y+10=0;solve for x and y​

Answer 1

Answer:

$6x + 7y = 14.......a \\ 8x - 4y = - 10....b \\ equation \: \: a \: \times 4 + equation \: \: b \: \times 7 \\ 24x + 28y = 14 \\ 56x - 28y = - 70 \\ 80x = - 70 \\ x = \frac{ - 7}{8} \\ put \: the \: value \: of \: x \: in \: equation \: a \\ 6( \frac{ - 7}{8} ) + 7y = 14 \\ \frac{ - 21}{4} + 7y = 14 \\ 7y = 14 + \frac{21}{4} \\ 7y = \frac{56 + 21}{4} \\ 7y = \frac{77}{4} \\ y = \frac{11}{4}$

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Answer 2

the value of x = -9/40 and y = 41/20

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