Question

solve the following linear equation in two variables by applying cross - multiplication method : X + Y = 2b

X - Y =2a​

Answer 1

Answer:

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Answer 2

Answer:

$x + y = 2b \\ x - y = 2a \\ = > 2a(x + y) = 2b(x - y) \\ = > 2ax + 2ay = 2bx - 2by \\ = > ax + ay = bx - by$