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Find number abc

If aac11 + 50bc4 = 7b195 find number abc. Multiple solutions may exist.

Correct answers: 20

The first user who solved this task is Nílton Corrêa de Sousa.

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A redneck goes to a drug store...

A redneck goes to a drug store and says to the pharmacist, "I got a hot date tonight, and I need me some protection. How much is a pack of them rubbers gonna cost me?"
The pharmacist responds, "A three-pack of condoms is $4.99 with tax."
"Tacks!" the shocked redneck says. "Don't they stay on by themselves?"

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Harold Stephen Black

Died 11 Dec 1983 at age 85 (born 14 Apr 1898).American electrical engineer who discovered and developed the negative-feedback principle, in which amplification output is fed back into the input, thus producing nearly distortionless and steady amplification. In 1921, Black joined the forerunner of Bell Labs, in New York City, working on elimination of distortion. After six years of persistence, Black conceived his negative feedback amplifier in a flash commuting to work aboard the ferry. Basically, the concept involved feeding systems output back to the input as a method of system control. The principle has found widespread applications in electronics, including industrial, military, and consumer electronics, weaponry, analog computers, and such biomechanical devices as pacemakers.

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