7(x+10)+9=100

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Solution for 7(x+10)+9=100 equation:


Simplifying
7(x + 10) + 9 = 100

Reorder the terms:
7(10 + x) + 9 = 100
(10 * 7 + x * 7) + 9 = 100
(70 + 7x) + 9 = 100

Reorder the terms:
70 + 9 + 7x = 100

Combine like terms: 70 + 9 = 79
79 + 7x = 100

Solving
79 + 7x = 100

Solving for variable 'x'.

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

Add '-79' to each side of the equation.
79 + -79 + 7x = 100 + -79

Combine like terms: 79 + -79 = 0
0 + 7x = 100 + -79
7x = 100 + -79

Combine like terms: 100 + -79 = 21
7x = 21

Divide each side by '7'.
x = 3

Simplifying
x = 3

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