15(x-1)-7(x+9)=4x

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Solution for 15(x-1)-7(x+9)=4x equation:


Simplifying
15(x + -1) + -7(x + 9) = 4x

Reorder the terms:
15(-1 + x) + -7(x + 9) = 4x
(-1 * 15 + x * 15) + -7(x + 9) = 4x
(-15 + 15x) + -7(x + 9) = 4x

Reorder the terms:
-15 + 15x + -7(9 + x) = 4x
-15 + 15x + (9 * -7 + x * -7) = 4x
-15 + 15x + (-63 + -7x) = 4x

Reorder the terms:
-15 + -63 + 15x + -7x = 4x

Combine like terms: -15 + -63 = -78
-78 + 15x + -7x = 4x

Combine like terms: 15x + -7x = 8x
-78 + 8x = 4x

Solving
-78 + 8x = 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
-78 + 8x + -4x = 4x + -4x

Combine like terms: 8x + -4x = 4x
-78 + 4x = 4x + -4x

Combine like terms: 4x + -4x = 0
-78 + 4x = 0

Add '78' to each side of the equation.
-78 + 78 + 4x = 0 + 78

Combine like terms: -78 + 78 = 0
0 + 4x = 0 + 78
4x = 0 + 78

Combine like terms: 0 + 78 = 78
4x = 78

Divide each side by '4'.
x = 19.5

Simplifying
x = 19.5

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