5x-4(4)=21

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Solution for 5x-4(4)=21 equation: 


Simplifying
5x + -4(4) = 21

Multiply -4 * 4
5x + -16 = 21

Reorder the terms:
-16 + 5x = 21

Solving
-16 + 5x = 21

Solving for variable 'x'.

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

Add '16' to each side of the equation.
-16 + 16 + 5x = 21 + 16

Combine like terms: -16 + 16 = 0
0 + 5x = 21 + 16
5x = 21 + 16

Combine like terms: 21 + 16 = 37
5x = 37

Divide each side by '5'.
x = 7.4

Simplifying
x = 7.4

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