Question

7xy + 2x2 + 5x3 = 20
X] - 4x2 + 6x3 = 7
5x1 + 7x2 – 2x3 = 5

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Step-by-step explanation:

1)

$7xy + 4 + 15 = 20$

$7xy = 20 - 15 - 4$

$7xy = 1$

$xy = \binom{1}{7}$

2)

$x) - 8 + 18 = 7$

$x = 7 - 18 + 8$

$x = - 3$

3)

$5 + 14 - 6 = 5$

$13 = 5$