4x+5(x+21)=15

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Solution for 4x+5(x+21)=15 equation:


Simplifying
4x + 5(x + 21) = 15

Reorder the terms:
4x + 5(21 + x) = 15
4x + (21 * 5 + x * 5) = 15
4x + (105 + 5x) = 15

Reorder the terms:
105 + 4x + 5x = 15

Combine like terms: 4x + 5x = 9x
105 + 9x = 15

Solving
105 + 9x = 15

Solving for variable 'x'.

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

Add '-105' to each side of the equation.
105 + -105 + 9x = 15 + -105

Combine like terms: 105 + -105 = 0
0 + 9x = 15 + -105
9x = 15 + -105

Combine like terms: 15 + -105 = -90
9x = -90

Divide each side by '9'.
x = -10

Simplifying
x = -10

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