4x-7(x-9)=42

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Solution for 4x-7(x-9)=42 equation:


Simplifying
4x + -7(x + -9) = 42

Reorder the terms:
4x + -7(-9 + x) = 42
4x + (-9 * -7 + x * -7) = 42
4x + (63 + -7x) = 42

Reorder the terms:
63 + 4x + -7x = 42

Combine like terms: 4x + -7x = -3x
63 + -3x = 42

Solving
63 + -3x = 42

Solving for variable 'x'.

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

Add '-63' to each side of the equation.
63 + -63 + -3x = 42 + -63

Combine like terms: 63 + -63 = 0
0 + -3x = 42 + -63
-3x = 42 + -63

Combine like terms: 42 + -63 = -21
-3x = -21

Divide each side by '-3'.
x = 7

Simplifying
x = 7

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