3x-4=21x-7

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Solution for 3x-4=21x-7 equation:


Simplifying
3x + -4 = 21x + -7

Reorder the terms:
-4 + 3x = 21x + -7

Reorder the terms:
-4 + 3x = -7 + 21x

Solving
-4 + 3x = -7 + 21x

Solving for variable 'x'.

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

Add '-21x' to each side of the equation.
-4 + 3x + -21x = -7 + 21x + -21x

Combine like terms: 3x + -21x = -18x
-4 + -18x = -7 + 21x + -21x

Combine like terms: 21x + -21x = 0
-4 + -18x = -7 + 0
-4 + -18x = -7

Add '4' to each side of the equation.
-4 + 4 + -18x = -7 + 4

Combine like terms: -4 + 4 = 0
0 + -18x = -7 + 4
-18x = -7 + 4

Combine like terms: -7 + 4 = -3
-18x = -3

Divide each side by '-18'.
x = 0.1666666667

Simplifying
x = 0.1666666667

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