(2x-1)(15+9x)-6x(3x-5)=87
30x+18x^2-15-9x-18x^2+30x=87
51x=87+15
51x=102
x=102:51
x=2
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(2x-1)(15+9x)-6x(3x-5)=87
30x+18x^2-15-9x-18x^2+30x=87
51x=87+15
51x=102
x=102:51
x=2