7x-21+x+5=15

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Solution for 7x-21+x+5=15 equation:


Simplifying
7x + -21 + x + 5 = 15

Reorder the terms:
-21 + 5 + 7x + x = 15

Combine like terms: -21 + 5 = -16
-16 + 7x + x = 15

Combine like terms: 7x + x = 8x
-16 + 8x = 15

Solving
-16 + 8x = 15

Solving for variable 'x'.

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

Add '16' to each side of the equation.
-16 + 16 + 8x = 15 + 16

Combine like terms: -16 + 16 = 0
0 + 8x = 15 + 16
8x = 15 + 16

Combine like terms: 15 + 16 = 31
8x = 31

Divide each side by '8'.
x = 3.875

Simplifying
x = 3.875

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