(-8x-21)-(15x-4)=

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Solution for (-8x-21)-(15x-4)= equation:


Simplifying
(-8x + -21) + -1(15x + -4) = 0

Reorder the terms:
(-21 + -8x) + -1(15x + -4) = 0

Remove parenthesis around (-21 + -8x)
-21 + -8x + -1(15x + -4) = 0

Reorder the terms:
-21 + -8x + -1(-4 + 15x) = 0
-21 + -8x + (-4 * -1 + 15x * -1) = 0
-21 + -8x + (4 + -15x) = 0

Reorder the terms:
-21 + 4 + -8x + -15x = 0

Combine like terms: -21 + 4 = -17
-17 + -8x + -15x = 0

Combine like terms: -8x + -15x = -23x
-17 + -23x = 0

Solving
-17 + -23x = 0

Solving for variable 'x'.

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

Add '17' to each side of the equation.
-17 + 17 + -23x = 0 + 17

Combine like terms: -17 + 17 = 0
0 + -23x = 0 + 17
-23x = 0 + 17

Combine like terms: 0 + 17 = 17
-23x = 17

Divide each side by '-23'.
x = -0.7391304348

Simplifying
x = -0.7391304348

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