21=48-36x

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Solution for 21=48-36x equation:


Simplifying
21 = 48 + -36x

Solving
21 = 48 + -36x

Solving for variable 'x'.

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

Add '36x' to each side of the equation.
21 + 36x = 48 + -36x + 36x

Combine like terms: -36x + 36x = 0
21 + 36x = 48 + 0
21 + 36x = 48

Add '-21' to each side of the equation.
21 + -21 + 36x = 48 + -21

Combine like terms: 21 + -21 = 0
0 + 36x = 48 + -21
36x = 48 + -21

Combine like terms: 48 + -21 = 27
36x = 27

Divide each side by '36'.
x = 0.75

Simplifying
x = 0.75

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