15=7x+3-4x

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Solution for 15=7x+3-4x equation:


Simplifying
15 = 7x + 3 + -4x

Reorder the terms:
15 = 3 + 7x + -4x

Combine like terms: 7x + -4x = 3x
15 = 3 + 3x

Solving
15 = 3 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
15 + -3x = 3 + 3x + -3x

Combine like terms: 3x + -3x = 0
15 + -3x = 3 + 0
15 + -3x = 3

Add '-15' to each side of the equation.
15 + -15 + -3x = 3 + -15

Combine like terms: 15 + -15 = 0
0 + -3x = 3 + -15
-3x = 3 + -15

Combine like terms: 3 + -15 = -12
-3x = -12

Divide each side by '-3'.
x = 4

Simplifying
x = 4

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