Question

[(x:4+5):6+10]:10+3=13 va rog repede

Answer 1

[(x:4+5):6+10]:10+3=13 /-3

= [(x:4+5):6+10]:10=10 /×10

= [(x:4+5):6+10]=100 /-10

= [(x:4+5):6]=90 /×6

= (x:4+5)=540 /-5

= x:4=535

x = 535 x 4

x = 2140