Question 53175
13X-4(2X+5)=15 OR 13X-8X-20=15 OR 5X=15+20 OR 5X=35 OR X=35/5 OR X=7

PROOF 13*7-4(2*7+5)=15 OR 91-4(14+5)=15 OR 91-4*19=15 OR 91-76=15 OR 15=15