100(10+-0.4y)+40y=1000

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Solution for 100(10+-0.4y)+40y=1000 equation:


Simplifying
100(10 + -0.4y) + 40y = 1000
(10 * 100 + -0.4y * 100) + 40y = 1000
(1000 + -40y) + 40y = 1000

Combine like terms: -40y + 40y = 0
1000 + 0 = 1000
1000 = 1000

Add '-1000' to each side of the equation.
1000 + -1000 = 1000 + -1000

Combine like terms: 1000 + -1000 = 0
0 = 1000 + -1000

Combine like terms: 1000 + -1000 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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