7(x+1)+3(x+4)=9

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Solution for 7(x+1)+3(x+4)=9 equation:


Simplifying
7(x + 1) + 3(x + 4) = 9

Reorder the terms:
7(1 + x) + 3(x + 4) = 9
(1 * 7 + x * 7) + 3(x + 4) = 9
(7 + 7x) + 3(x + 4) = 9

Reorder the terms:
7 + 7x + 3(4 + x) = 9
7 + 7x + (4 * 3 + x * 3) = 9
7 + 7x + (12 + 3x) = 9

Reorder the terms:
7 + 12 + 7x + 3x = 9

Combine like terms: 7 + 12 = 19
19 + 7x + 3x = 9

Combine like terms: 7x + 3x = 10x
19 + 10x = 9

Solving
19 + 10x = 9

Solving for variable 'x'.

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

Add '-19' to each side of the equation.
19 + -19 + 10x = 9 + -19

Combine like terms: 19 + -19 = 0
0 + 10x = 9 + -19
10x = 9 + -19

Combine like terms: 9 + -19 = -10
10x = -10

Divide each side by '10'.
x = -1

Simplifying
x = -1

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