please help its urgent

Dear Student,

(i) 
The given system of equations is
ax + by = a – b  … (1)
bx – ay = a + b  … (2)
Multiplying (1) by a and (2) by b, we get

From (1), we get
a ×1 + by = a – b
by = aba
by = –b
y = –1

Thus, the values of a and b are 1 and –1 respectively.
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