7-4(2x-1)=21

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Solution for 7-4(2x-1)=21 equation:


Simplifying
7 + -4(2x + -1) = 21

Reorder the terms:
7 + -4(-1 + 2x) = 21
7 + (-1 * -4 + 2x * -4) = 21
7 + (4 + -8x) = 21

Combine like terms: 7 + 4 = 11
11 + -8x = 21

Solving
11 + -8x = 21

Solving for variable 'x'.

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

Add '-11' to each side of the equation.
11 + -11 + -8x = 21 + -11

Combine like terms: 11 + -11 = 0
0 + -8x = 21 + -11
-8x = 21 + -11

Combine like terms: 21 + -11 = 10
-8x = 10

Divide each side by '-8'.
x = -1.25

Simplifying
x = -1.25

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