5X+4*(X-2)+7*(X+4)=100

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Solution for 5X+4*(X-2)+7*(X+4)=100 equation:


Simplifying
5X + 4(X + -2) + 7(X + 4) = 100

Reorder the terms:
5X + 4(-2 + X) + 7(X + 4) = 100
5X + (-2 * 4 + X * 4) + 7(X + 4) = 100
5X + (-8 + 4X) + 7(X + 4) = 100

Reorder the terms:
5X + -8 + 4X + 7(4 + X) = 100
5X + -8 + 4X + (4 * 7 + X * 7) = 100
5X + -8 + 4X + (28 + 7X) = 100

Reorder the terms:
-8 + 28 + 5X + 4X + 7X = 100

Combine like terms: -8 + 28 = 20
20 + 5X + 4X + 7X = 100

Combine like terms: 5X + 4X = 9X
20 + 9X + 7X = 100

Combine like terms: 9X + 7X = 16X
20 + 16X = 100

Solving
20 + 16X = 100

Solving for variable 'X'.

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

Add '-20' to each side of the equation.
20 + -20 + 16X = 100 + -20

Combine like terms: 20 + -20 = 0
0 + 16X = 100 + -20
16X = 100 + -20

Combine like terms: 100 + -20 = 80
16X = 80

Divide each side by '16'.
X = 5

Simplifying
X = 5

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