Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

How can you make a TV, a bed, a dog, and a car liquid?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

What does below Rebus mean ?

esgg sgeg gegs gsge

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Why is it very easy to weigh a fish?

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?