`a, x= 10958 - 3895 = 7043.`
`b, x = 85764 - 318 = 85446`.
\(a)x+3895=10958\)
\(x=10958-3895\)
\(x=7063\)
\(-------------------\)
\(b)85764-x=318\)
\(x=85764-318\)
\(x=85446\)
a) x + 3895= 10958
x = 10958 - 3895
x = 7063
b) 95764 - x= 318
x= 95768 - 318
x= 95450