Show that for a feild f, the set s of all matrices of
theform
for a, b in f is a right ideal but not a left ideal
of.
that is, show that s is a subring closed undermultiplication on the
right by any element of
, but is not closed under leftmultiplication.

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?