b)307x19--[3x569+(x-1875)]=1
5833-[1707+(x-1875)]=1
1707+(x-1875)=5833-1
1707+(x-1875)=5832
x-1875=5832-1707
x-1875=4125
x=4125+1875
x=6000
a)(705:a-105x5):2;9+4x9+4x9;3=58
(705:a-525):2:9+36+12=58
(705:a-525):2:9+36=58-12
(705:a-525):2:9+36=46
(705:a-525):2:9=46-36
(705:a-525):2:9=10
(705:a-525):2=10x9
(705:a-525):2=90
705:a-525=90x2
705:a-525=180
705:a=180+525
705:a=705
a=705:705
a=1
