Question

(x+6)(x-1)-(x+3)(x-4)=5x​

Answer 1

$(x+6)(x-1)-(x+3)(x-4)=5x\\x^{2} -x+6x-6-(x^{2} -4x+3x-12)=5x\\x^{2} -x+6x-6-(x^{2} -x-12)=5x\\x^{2} -x+6x-6-x^{2} +x+12=5x\\6x+6=5x\\6x-5x=-6\\x=-6$