3x-7(4-x)=15

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


Simplifying
3x + -7(4 + -1x) = 15
3x + (4 * -7 + -1x * -7) = 15
3x + (-28 + 7x) = 15

Reorder the terms:
-28 + 3x + 7x = 15

Combine like terms: 3x + 7x = 10x
-28 + 10x = 15

Solving
-28 + 10x = 15

Solving for variable 'x'.

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

Add '28' to each side of the equation.
-28 + 28 + 10x = 15 + 28

Combine like terms: -28 + 28 = 0
0 + 10x = 15 + 28
10x = 15 + 28

Combine like terms: 15 + 28 = 43
10x = 43

Divide each side by '10'.
x = 4.3

Simplifying
x = 4.3

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