Question

for each value of $u$, determine whether it is a solution to $42=49-u$.
$u$ is it a solution?
yes no
11 ○ ○
4 ○ ○
46 ○ ○
8 ○ ○

Explanation:

Step1: Substitute u=11 into equation

$42 = 49 - 11$ → $42 = 38$ (False)

Step2: Substitute u=4 into equation

$42 = 49 - 4$ → $42 = 45$ (False)

Step3: Substitute u=46 into equation

$42 = 49 - 46$ → $42 = 3$ (False)

Step4: Substitute u=8 into equation

$42 = 49 - 8$ → $42 = 41$ (False)

Step5: Verify actual solution (optional check)

Rearrange equation: $u = 49 - 42$ → $u=7$ (none of given values match)

Answer:

$u$	Is it a solution?
4	No
46	No
8	No