Question

x + y = a +b
ax - by = a^2-b^2
​

Answer 1

Step-by-step explanation:

x+y=a+b (1)

ax-by=a^2-b^2 (2)

eq1 multiply by a &eq 2 multyply by _

ax+ay=a^2+ab

-ax+by=-a^2+b^2

_____________

ay+by=ab+b^2

y(a+b)=b(a+b)

y/b=1

y=b

put balue of y in (1)

x+b=a+b

x=a