7x+3(-.5x-5)=21

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Solution for 7x+3(-.5x-5)=21 equation:


Simplifying
7x + 3(-0.5x + -5) = 21

Reorder the terms:
7x + 3(-5 + -0.5x) = 21
7x + (-5 * 3 + -0.5x * 3) = 21
7x + (-15 + -1.5x) = 21

Reorder the terms:
-15 + 7x + -1.5x = 21

Combine like terms: 7x + -1.5x = 5.5x
-15 + 5.5x = 21

Solving
-15 + 5.5x = 21

Solving for variable 'x'.

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

Add '15' to each side of the equation.
-15 + 15 + 5.5x = 21 + 15

Combine like terms: -15 + 15 = 0
0 + 5.5x = 21 + 15
5.5x = 21 + 15

Combine like terms: 21 + 15 = 36
5.5x = 36

Divide each side by '5.5'.
x = 6.545454545

Simplifying
x = 6.545454545

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