4x-(-21)=39

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Solution for 4x-(-21)=39 equation: 


Simplifying
4x + -1(-21) = 39

Multiply -1 * -21
4x + 21 = 39

Reorder the terms:
21 + 4x = 39

Solving
21 + 4x = 39

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 4x = 39 + -21

Combine like terms: 21 + -21 = 0
0 + 4x = 39 + -21
4x = 39 + -21

Combine like terms: 39 + -21 = 18
4x = 18

Divide each side by '4'.
x = 4.5

Simplifying
x = 4.5

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