3x+(x+10)=90

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Solution for 3x+(x+10)=90 equation:


Simplifying
3x + (x + 10) = 90

Reorder the terms:
3x + (10 + x) = 90

Remove parenthesis around (10 + x)
3x + 10 + x = 90

Reorder the terms:
10 + 3x + x = 90

Combine like terms: 3x + x = 4x
10 + 4x = 90

Solving
10 + 4x = 90

Solving for variable 'x'.

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

Add '-10' to each side of the equation.
10 + -10 + 4x = 90 + -10

Combine like terms: 10 + -10 = 0
0 + 4x = 90 + -10
4x = 90 + -10

Combine like terms: 90 + -10 = 80
4x = 80

Divide each side by '4'.
x = 20

Simplifying
x = 20

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