3x+8x-7=21x-5

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Solution for 3x+8x-7=21x-5 equation:


Simplifying
3x + 8x + -7 = 21x + -5

Reorder the terms:
-7 + 3x + 8x = 21x + -5

Combine like terms: 3x + 8x = 11x
-7 + 11x = 21x + -5

Reorder the terms:
-7 + 11x = -5 + 21x

Solving
-7 + 11x = -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 + 11x + -21x = -5 + 21x + -21x

Combine like terms: 11x + -21x = -10x
-7 + -10x = -5 + 21x + -21x

Combine like terms: 21x + -21x = 0
-7 + -10x = -5 + 0
-7 + -10x = -5

Add '7' to each side of the equation.
-7 + 7 + -10x = -5 + 7

Combine like terms: -7 + 7 = 0
0 + -10x = -5 + 7
-10x = -5 + 7

Combine like terms: -5 + 7 = 2
-10x = 2

Divide each side by '-10'.
x = -0.2

Simplifying
x = -0.2

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