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Evilgus4846
06.11.2019 •
Mathematics
If x = 5 and 5 = y, then x = y what algebraic equality property justifies the above statement? reflexive transitive symmetric addition
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Ответ:
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Ответ:
y = 7 + z - 2x
Then, substitute the y's in the second and third equation with that of the expression derived in the first equation.
(2) -x - 2(7 + z - 2x) + 4z = -15
Simplifying,
-x - 14 -2z + 4x + 4z = -15
Simplifying further,
3x + 2z = -1
(3) x + 2(7 + z - 2x) - 5x = 17
Simplifying,
x + 14 + 2z - 4x - 5x = 17
Simplifying further,
-3x - 3z = 3
The equations derived are,
3x + 2z = -1
x + z = -1
The values of x and z in the equation are 1 and -2, respectively. To solve for y,
y = 7 + (-2) - 2(1) = 3
ANSWERS: x = 1, y = 3, and z = -2