Răspuns :
x•6 = 636 => x = 636 : 6 => x = 106
x + 12 = 192 => x = 192 - 12 => x = 180
2•y = 214 => y = 214 : 2 => y = 107
404 - y = 230 => y = 404 - 230 => y = 174
981 : z = 3 => z = 981 : 3 => z = 327
z - 127 = 208 => z = 127 + 208 => z = 335
x + 12 = 192 => x = 192 - 12 => x = 180
2•y = 214 => y = 214 : 2 => y = 107
404 - y = 230 => y = 404 - 230 => y = 174
981 : z = 3 => z = 981 : 3 => z = 327
z - 127 = 208 => z = 127 + 208 => z = 335