7(x-9)=-5x+21

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Solution for 7(x-9)=-5x+21 equation:


Simplifying
7(x + -9) = -5x + 21

Reorder the terms:
7(-9 + x) = -5x + 21
(-9 * 7 + x * 7) = -5x + 21
(-63 + 7x) = -5x + 21

Reorder the terms:
-63 + 7x = 21 + -5x

Solving
-63 + 7x = 21 + -5x

Solving for variable 'x'.

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

Add '5x' to each side of the equation.
-63 + 7x + 5x = 21 + -5x + 5x

Combine like terms: 7x + 5x = 12x
-63 + 12x = 21 + -5x + 5x

Combine like terms: -5x + 5x = 0
-63 + 12x = 21 + 0
-63 + 12x = 21

Add '63' to each side of the equation.
-63 + 63 + 12x = 21 + 63

Combine like terms: -63 + 63 = 0
0 + 12x = 21 + 63
12x = 21 + 63

Combine like terms: 21 + 63 = 84
12x = 84

Divide each side by '12'.
x = 7

Simplifying
x = 7

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