42=3x+4(x+7)

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Solution for 42=3x+4(x+7) equation:


Simplifying
42 = 3x + 4(x + 7)

Reorder the terms:
42 = 3x + 4(7 + x)
42 = 3x + (7 * 4 + x * 4)
42 = 3x + (28 + 4x)

Reorder the terms:
42 = 28 + 3x + 4x

Combine like terms: 3x + 4x = 7x
42 = 28 + 7x

Solving
42 = 28 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
42 + -7x = 28 + 7x + -7x

Combine like terms: 7x + -7x = 0
42 + -7x = 28 + 0
42 + -7x = 28

Add '-42' to each side of the equation.
42 + -42 + -7x = 28 + -42

Combine like terms: 42 + -42 = 0
0 + -7x = 28 + -42
-7x = 28 + -42

Combine like terms: 28 + -42 = -14
-7x = -14

Divide each side by '-7'.
x = 2

Simplifying
x = 2

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