Suppose it is x.
Then x + 1.6 = 9
Subtract 1.6 from both sides: x = 9 - 1.6 = 7.4
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Nine less than twice a number equals the same number increased by four?
40
That sounds like: if you multiply it by 16, the result is the same as if you add 225 to it. You can write this as an equation - calling the number "x" - as follows: 16x = x + 225 Solve this equation, and you have your number.
16+2x=-56 -56-16=2x -72=2x x=-72/2 x=-36