3x+7(x+3)=31

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Solution for 3x+7(x+3)=31 equation:


Simplifying
3x + 7(x + 3) = 31

Reorder the terms:
3x + 7(3 + x) = 31
3x + (3 * 7 + x * 7) = 31
3x + (21 + 7x) = 31

Reorder the terms:
21 + 3x + 7x = 31

Combine like terms: 3x + 7x = 10x
21 + 10x = 31

Solving
21 + 10x = 31

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 10x = 31 + -21

Combine like terms: 21 + -21 = 0
0 + 10x = 31 + -21
10x = 31 + -21

Combine like terms: 31 + -21 = 10
10x = 10

Divide each side by '10'.
x = 1

Simplifying
x = 1

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