x+(x+5)+3(x+5)=90

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Solution for x+(x+5)+3(x+5)=90 equation:


Simplifying
x + (x + 5) + 3(x + 5) = 90

Reorder the terms:
x + (5 + x) + 3(x + 5) = 90

Remove parenthesis around (5 + x)
x + 5 + x + 3(x + 5) = 90

Reorder the terms:
x + 5 + x + 3(5 + x) = 90
x + 5 + x + (5 * 3 + x * 3) = 90
x + 5 + x + (15 + 3x) = 90

Reorder the terms:
5 + 15 + x + x + 3x = 90

Combine like terms: 5 + 15 = 20
20 + x + x + 3x = 90

Combine like terms: x + x = 2x
20 + 2x + 3x = 90

Combine like terms: 2x + 3x = 5x
20 + 5x = 90

Solving
20 + 5x = 90

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 + 5x = 90 + -20

Combine like terms: 20 + -20 = 0
0 + 5x = 90 + -20
5x = 90 + -20

Combine like terms: 90 + -20 = 70
5x = 70

Divide each side by '5'.
x = 14

Simplifying
x = 14

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