4*(5*X-3)-7=21

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Solution for 4*(5*X-3)-7=21 equation: 


Simplifying
4(5X + -3) + -7 = 21

Reorder the terms:
4(-3 + 5X) + -7 = 21
(-3 * 4 + 5X * 4) + -7 = 21
(-12 + 20X) + -7 = 21

Reorder the terms:
-12 + -7 + 20X = 21

Combine like terms: -12 + -7 = -19
-19 + 20X = 21

Solving
-19 + 20X = 21

Solving for variable 'X'.

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

Add '19' to each side of the equation.
-19 + 19 + 20X = 21 + 19

Combine like terms: -19 + 19 = 0
0 + 20X = 21 + 19
20X = 21 + 19

Combine like terms: 21 + 19 = 40
20X = 40

Divide each side by '20'.
X = 2

Simplifying
X = 2

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