Question

Gasiti x din egalitatile
a){[(5x -2):8+4]:3}•100=500

b) 3+5•{23+3[28+5•( x-32)]}+202=730
c) {[( 67•x-186)•4-45]•14+290}:500=1

Answer 1

a){[(5x -2):8+4]:3}•100=500
(5x-2:8+4):3×100=500
5x:300=500
5x=500×300
5x=150000
x=150000/5=30000
b) 3+5•{23+3[28+5•( x-32)]}+202=730
3+5(23+3×28+5x-160)+202=730
3+5(53+5x)+202=730
3+265+25+202=730
25x+470=730
25x=730-470
25x=260
x=260/25=52/5
 c )  
{[( 67•x-186)•4-45]•14+290}:500=1
(268x-740×14+290):500=1
(268-10360+290):500=1
268x-10070/500-500/500=134000-10070-500totul pe500=12343/50