21=-3+4(x+2)

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Solution for 21=-3+4(x+2) equation: 


Simplifying
21 = -3 + 4(x + 2)

Reorder the terms:
21 = -3 + 4(2 + x)
21 = -3 + (2 * 4 + x * 4)
21 = -3 + (8 + 4x)

Combine like terms: -3 + 8 = 5
21 = 5 + 4x

Solving
21 = 5 + 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.
21 + -4x = 5 + 4x + -4x

Combine like terms: 4x + -4x = 0
21 + -4x = 5 + 0
21 + -4x = 5

Add '-21' to each side of the equation.
21 + -21 + -4x = 5 + -21

Combine like terms: 21 + -21 = 0
0 + -4x = 5 + -21
-4x = 5 + -21

Combine like terms: 5 + -21 = -16
-4x = -16

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

Simplifying
x = 4

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