7x-(8x+9)=8x-45

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Solution for 7x-(8x+9)=8x-45 equation:


Simplifying
7x + -1(8x + 9) = 8x + -45

Reorder the terms:
7x + -1(9 + 8x) = 8x + -45
7x + (9 * -1 + 8x * -1) = 8x + -45
7x + (-9 + -8x) = 8x + -45

Reorder the terms:
-9 + 7x + -8x = 8x + -45

Combine like terms: 7x + -8x = -1x
-9 + -1x = 8x + -45

Reorder the terms:
-9 + -1x = -45 + 8x

Solving
-9 + -1x = -45 + 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
-9 + -1x + -8x = -45 + 8x + -8x

Combine like terms: -1x + -8x = -9x
-9 + -9x = -45 + 8x + -8x

Combine like terms: 8x + -8x = 0
-9 + -9x = -45 + 0
-9 + -9x = -45

Add '9' to each side of the equation.
-9 + 9 + -9x = -45 + 9

Combine like terms: -9 + 9 = 0
0 + -9x = -45 + 9
-9x = -45 + 9

Combine like terms: -45 + 9 = -36
-9x = -36

Divide each side by '-9'.
x = 4

Simplifying
x = 4

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