20=-3x+7(x+4)

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Solution for 20=-3x+7(x+4) equation:


Simplifying
20 = -3x + 7(x + 4)

Reorder the terms:
20 = -3x + 7(4 + x)
20 = -3x + (4 * 7 + x * 7)
20 = -3x + (28 + 7x)

Reorder the terms:
20 = 28 + -3x + 7x

Combine like terms: -3x + 7x = 4x
20 = 28 + 4x

Solving
20 = 28 + 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.
20 + -4x = 28 + 4x + -4x

Combine like terms: 4x + -4x = 0
20 + -4x = 28 + 0
20 + -4x = 28

Add '-20' to each side of the equation.
20 + -20 + -4x = 28 + -20

Combine like terms: 20 + -20 = 0
0 + -4x = 28 + -20
-4x = 28 + -20

Combine like terms: 28 + -20 = 8
-4x = 8

Divide each side by '-4'.
x = -2

Simplifying
x = -2

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