8j -k+148j−k+148, j, minus, k, plus, 14 when j=0.25j=0.25j, equals, 0, point, 25 and k=1k=1

It looks like you want to evaluate
.. 8j -k +14
for (j, k) = (0.25, 1).

Put the numbers where the letters are. If you cannot do the math, let your calculator do it.
.. 8*0.25 -1 +14
.. = 2 -1 +14
.. = 1 +14
.. = 15

The value of the expression is 15 at (j, k) = (0.25, 1).

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