15x+31=7x-4

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Solution for 15x+31=7x-4 equation:


Simplifying
15x + 31 = 7x + -4

Reorder the terms:
31 + 15x = 7x + -4

Reorder the terms:
31 + 15x = -4 + 7x

Solving
31 + 15x = -4 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
31 + 15x + -7x = -4 + 7x + -7x

Combine like terms: 15x + -7x = 8x
31 + 8x = -4 + 7x + -7x

Combine like terms: 7x + -7x = 0
31 + 8x = -4 + 0
31 + 8x = -4

Add '-31' to each side of the equation.
31 + -31 + 8x = -4 + -31

Combine like terms: 31 + -31 = 0
0 + 8x = -4 + -31
8x = -4 + -31

Combine like terms: -4 + -31 = -35
8x = -35

Divide each side by '8'.
x = -4.375

Simplifying
x = -4.375

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