Answer:
See below,
Step-by-step explanation:
a) mx - ny = n
y = x
Substitute y = x in the first equation:
mx - nx = n
x(m - n) = n
x = n / (m -n).
y = n / (m - n). (ANSWER)
b) mx + y = m
x = y + m/n
Substitute for x in the first equation:
m(y + m/n) + y = m
my + n + y = m
y(m + 1) = m - n
y = (m - n)/ ( m + 1). (ANSWER)
Substitute for y in the second equation:
x = (m - n)/ ( m + 1) + m/n
x = [n(m - n) + m(m + 1)] / n(m + 1)
x = (nm - n^2 + m^2 + m) / ( nm + n). (ANSWER).
