300=7x-(100+3x)

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Solution for 300=7x-(100+3x) equation:


Simplifying
300 = 7x + -1(100 + 3x)
300 = 7x + (100 * -1 + 3x * -1)
300 = 7x + (-100 + -3x)

Reorder the terms:
300 = -100 + 7x + -3x

Combine like terms: 7x + -3x = 4x
300 = -100 + 4x

Solving
300 = -100 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
300 + -4x = -100 + 4x + -4x

Combine like terms: 4x + -4x = 0
300 + -4x = -100 + 0
300 + -4x = -100

Add '-300' to each side of the equation.
300 + -300 + -4x = -100 + -300

Combine like terms: 300 + -300 = 0
0 + -4x = -100 + -300
-4x = -100 + -300

Combine like terms: -100 + -300 = -400
-4x = -400

Divide each side by '-4'.
x = 100

Simplifying
x = 100

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