3x+7(1-x)=15

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Solution for 3x+7(1-x)=15 equation:


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

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

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

Solving
7 + -4x = 15

Solving for variable 'x'.

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

Add '-7' to each side of the equation.
7 + -7 + -4x = 15 + -7

Combine like terms: 7 + -7 = 0
0 + -4x = 15 + -7
-4x = 15 + -7

Combine like terms: 15 + -7 = 8
-4x = 8

Divide each side by '-4'.
x = -2

Simplifying
x = -2

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