User:The minister of poker at sea

The minister of poker at sea believes that a bird in the hand is the same as two in the bush.
 * $$a=b$$
 * $$a-2a=b-2b$$
 * $$a-b=2a-2b$$
 * $$a-b=2(a-b)$$
 * $$ab=b^2$$
 * $$ab-a^2=b^2-a^2$$
 * $$a(b-a)=(b+a)(b-a)$$
 * $$a=b+a$$
 * $$b=b+b$$
 * $$b=2b$$
 * $$1=2$$