Răspuns:
2x + 8 = 263 + 61
2x = 202 - 8
2x = 194
x = 97
[tex]2x+2^6:2^3=263+2^6-3\\2x+2^3=263+64-3\\2x+8=324 / -8\\2x=316 /:2\\x=158[/tex]