5-4(1-x)=21

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Solution for 5-4(1-x)=21 equation:


Simplifying
5 + -4(1 + -1x) = 21
5 + (1 * -4 + -1x * -4) = 21
5 + (-4 + 4x) = 21

Combine like terms: 5 + -4 = 1
1 + 4x = 21

Solving
1 + 4x = 21

Solving for variable 'x'.

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

Add '-1' to each side of the equation.
1 + -1 + 4x = 21 + -1

Combine like terms: 1 + -1 = 0
0 + 4x = 21 + -1
4x = 21 + -1

Combine like terms: 21 + -1 = 20
4x = 20

Divide each side by '4'.
x = 5

Simplifying
x = 5

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