Question

Solve by substitution method:
x + y = a + b
ax – by = a²-b²

Answer 1

Answer:

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Answer 2

Answer:

$ax + ay = ax + bx \\ ax - by = a {}^{2} - b { }^{2} \\ ay + by = a {}^{2} - b {}^{2} \\ y(a + b) = a {}^{2} - b {}^{2} \\ y = a {}^{2} - b {}^{2} \div a + b \\ y = a - b \\ x + (a - b) = a + b \\ x = a + b - a + b \\ x =2 b$

I hope your dobute is clear

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