3x+(7x+9)=100

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Solution for 3x+(7x+9)=100 equation:


Simplifying
3x + (7x + 9) = 100

Reorder the terms:
3x + (9 + 7x) = 100

Remove parenthesis around (9 + 7x)
3x + 9 + 7x = 100

Reorder the terms:
9 + 3x + 7x = 100

Combine like terms: 3x + 7x = 10x
9 + 10x = 100

Solving
9 + 10x = 100

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + 10x = 100 + -9

Combine like terms: 9 + -9 = 0
0 + 10x = 100 + -9
10x = 100 + -9

Combine like terms: 100 + -9 = 91
10x = 91

Divide each side by '10'.
x = 9.1

Simplifying
x = 9.1

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