8x+15=4x+21

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Solution for 8x+15=4x+21 equation:


Simplifying
8x + 15 = 4x + 21

Reorder the terms:
15 + 8x = 4x + 21

Reorder the terms:
15 + 8x = 21 + 4x

Solving
15 + 8x = 21 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
15 + 8x + -4x = 21 + 4x + -4x

Combine like terms: 8x + -4x = 4x
15 + 4x = 21 + 4x + -4x

Combine like terms: 4x + -4x = 0
15 + 4x = 21 + 0
15 + 4x = 21

Add '-15' to each side of the equation.
15 + -15 + 4x = 21 + -15

Combine like terms: 15 + -15 = 0
0 + 4x = 21 + -15
4x = 21 + -15

Combine like terms: 21 + -15 = 6
4x = 6

Divide each side by '4'.
x = 1.5

Simplifying
x = 1.5

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