9 * ( x - 3 ) - 10 * ( y + 3 ) = 19
6 * ( 2x - 9 ) - 25 * ( y + 4 ) = -6
Die Klammenrn ausmultiplizieren
9 * x - 27 - ( 10 * y + 30 ) = 19
12 * x - 54 - ( 25 * y + 100 ) = -6
9x - 27 - 10 y - 30 = 19
12x - 54 - 25y - 100 = -6
9x - 10 y = 76 | * 2.5
12x - 25y = 148
22.5x - 25y = 190
12x - 25y = 148 | -
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10.5 * x = 42
x = 4