3x-7=21x+5

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Solution for 3x-7=21x+5 equation:


Simplifying
3x + -7 = 21x + 5

Reorder the terms:
-7 + 3x = 21x + 5

Reorder the terms:
-7 + 3x = 5 + 21x

Solving
-7 + 3x = 5 + 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.
-7 + 3x + -21x = 5 + 21x + -21x

Combine like terms: 3x + -21x = -18x
-7 + -18x = 5 + 21x + -21x

Combine like terms: 21x + -21x = 0
-7 + -18x = 5 + 0
-7 + -18x = 5

Add '7' to each side of the equation.
-7 + 7 + -18x = 5 + 7

Combine like terms: -7 + 7 = 0
0 + -18x = 5 + 7
-18x = 5 + 7

Combine like terms: 5 + 7 = 12
-18x = 12

Divide each side by '-18'.
x = -0.6666666667

Simplifying
x = -0.6666666667

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