Question

rezolvati in Q ecuatia:1-3x supra 36-x la a 2 -x supra x+6 =-1

Answer 1

(1-3x)/(36-x)² -x/(x+6) =-1
(1-3x)/(6-x)(6+x) -x/(6+x) =-1
1-3x-6x+x²=-1(6-x)(6+x) 
1-9x+x²=-1(36-x²)
1-9x+x²=x²-36
1-9x=-36
9x=37
x=37/9