Question

If x = 1, y = 2 and z = 5, find the value of 3x − 2y + 4z

Answer 1

3x-2y+4z
Substituting x = 1, y = 2 and z = 5 in the given expression:
\[3 \times (1) -2 \times (2) +4 \times (5) = 3 - 4 + 20\]
\[ = 19\]