xxx + xx + x + x = 992
x * 111 + x * 11 + x + x = 992
x* (111 + 11 + 1 + 1) = 992
x* 124 = 992
x = 992 : 124
x = 8
xxx+xx+x+x=992
x*111+x*11+x*1+x*1=992
x *(111+11+1+1)=992
x*124=992
x=992:124
x=8
xxx + xx + x + x = 992
x * 111 + x * 11 + x + x = 992
x* (111 + 11 + 1 + 1) = 992
x* 124 = 992
x = 992 : 124
x = 8