7X+4(25-X)=400

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Solution for 7X+4(25-X)=400 equation:


Simplifying
7X + 4(25 + -1X) = 400
7X + (25 * 4 + -1X * 4) = 400
7X + (100 + -4X) = 400

Reorder the terms:
100 + 7X + -4X = 400

Combine like terms: 7X + -4X = 3X
100 + 3X = 400

Solving
100 + 3X = 400

Solving for variable 'X'.

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

Add '-100' to each side of the equation.
100 + -100 + 3X = 400 + -100

Combine like terms: 100 + -100 = 0
0 + 3X = 400 + -100
3X = 400 + -100

Combine like terms: 400 + -100 = 300
3X = 300

Divide each side by '3'.
X = 100

Simplifying
X = 100

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