28=3x+4x+7

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Solution for 28=3x+4x+7 equation:


Simplifying
28 = 3x + 4x + 7

Reorder the terms:
28 = 7 + 3x + 4x

Combine like terms: 3x + 4x = 7x
28 = 7 + 7x

Solving
28 = 7 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
28 + -7x = 7 + 7x + -7x

Combine like terms: 7x + -7x = 0
28 + -7x = 7 + 0
28 + -7x = 7

Add '-28' to each side of the equation.
28 + -28 + -7x = 7 + -28

Combine like terms: 28 + -28 = 0
0 + -7x = 7 + -28
-7x = 7 + -28

Combine like terms: 7 + -28 = -21
-7x = -21

Divide each side by '-7'.
x = 3

Simplifying
x = 3

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