a = 7 x 7 - 3 x 3 – 5 x 6
a = 49-9-30
a = 40-30
a = 10
b = 6 3:7 + 5 x 4 – 3 x 3
b = 9 + 20-9
b = 29-9
b= 20
c = 4 2:6 + 5 x 5 + 3 x 1
c = 7+25+3
c=32+3
c = 35
6 xa - 2 x b + c = 4 x a + 3 xb
6x•10-2x• 20+35 = 4x•10+3x•20
4x•200+35= 7x•200
4 • 40•235= 7•40 •200
37600= 56000
Nu prea am inteles enuntul..