tell whether the given ordered pair is a solution of the equation

Question

y = -1/2x + 4; (20,-6)

Answer 1

yes, as -6 = (-1/2)(20) + 4= -10+4 = -6

unless you really meant y = -1/(2x) +4

then No,

as -1/2(20) + 4 = 4-1/40 = 159/40 which doesn't = -6

you literally wrote it like the latter

but most likely intended the former