2/3x + 5/2y = 15...if u dont want to mess with fractions, multiply this by the common denominator of 6....giving us : 4x + 15y = 90
so now we have..
4x + 15y = 12....multiply by -1
4x + 15y = 90
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-4x - 15y = -12.....result of multiplying by -1
4x + 15y = 90
-----------------add
0 = 78......incorrect......there is no solution for this system of equations because ur lines are parallel