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2y - (x² - 9) = -48 - (x² - 25)
1/2(y +x) - 1/4(x + y) = 3/4 /*4
2y - x² + 9 = - 48 - x² + 25
2(y +x) - (x +y) = 3
2y + 9 = - 23
2y + 2x - x - y = 3
2y = -23 - 9
y + x = 3
2y = -32
y = - 16
-16 + x = 3
y = -16
x = 19
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2y - (x² - 9) = -48 - (x² - 25)
1/2(y +x) - 1/4(x + y) = 3/4 /*4
2y - x² + 9 = - 48 - x² + 25
2(y +x) - (x +y) = 3
2y + 9 = - 23
2y + 2x - x - y = 3
2y = -23 - 9
y + x = 3
2y = -32
y + x = 3
y = - 16
-16 + x = 3
y = -16
x = 19