100-y+3(100-y)-2y=100

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Solution for 100-y+3(100-y)-2y=100 equation:


Simplifying
100 + -1y + 3(100 + -1y) + -2y = 100
100 + -1y + (100 * 3 + -1y * 3) + -2y = 100
100 + -1y + (300 + -3y) + -2y = 100

Reorder the terms:
100 + 300 + -1y + -3y + -2y = 100

Combine like terms: 100 + 300 = 400
400 + -1y + -3y + -2y = 100

Combine like terms: -1y + -3y = -4y
400 + -4y + -2y = 100

Combine like terms: -4y + -2y = -6y
400 + -6y = 100

Solving
400 + -6y = 100

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '-400' to each side of the equation.
400 + -400 + -6y = 100 + -400

Combine like terms: 400 + -400 = 0
0 + -6y = 100 + -400
-6y = 100 + -400

Combine like terms: 100 + -400 = -300
-6y = -300

Divide each side by '-6'.
y = 50

Simplifying
y = 50

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