7x+4-(2x+7)+3*(4-x)=15

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Solution for 7x+4-(2x+7)+3*(4-x)=15 equation:


Simplifying
7x + 4 + -1(2x + 7) + 3(4 + -1x) = 15

Reorder the terms:
7x + 4 + -1(7 + 2x) + 3(4 + -1x) = 15
7x + 4 + (7 * -1 + 2x * -1) + 3(4 + -1x) = 15
7x + 4 + (-7 + -2x) + 3(4 + -1x) = 15
7x + 4 + -7 + -2x + (4 * 3 + -1x * 3) = 15
7x + 4 + -7 + -2x + (12 + -3x) = 15

Reorder the terms:
4 + -7 + 12 + 7x + -2x + -3x = 15

Combine like terms: 4 + -7 = -3
-3 + 12 + 7x + -2x + -3x = 15

Combine like terms: -3 + 12 = 9
9 + 7x + -2x + -3x = 15

Combine like terms: 7x + -2x = 5x
9 + 5x + -3x = 15

Combine like terms: 5x + -3x = 2x
9 + 2x = 15

Solving
9 + 2x = 15

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 + 2x = 15 + -9

Combine like terms: 9 + -9 = 0
0 + 2x = 15 + -9
2x = 15 + -9

Combine like terms: 15 + -9 = 6
2x = 6

Divide each side by '2'.
x = 3

Simplifying
x = 3

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