21=-4+7(x-2)

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Solution for 21=-4+7(x-2) equation:


Simplifying
21 = -4 + 7(x + -2)

Reorder the terms:
21 = -4 + 7(-2 + x)
21 = -4 + (-2 * 7 + x * 7)
21 = -4 + (-14 + 7x)

Combine like terms: -4 + -14 = -18
21 = -18 + 7x

Solving
21 = -18 + 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.
21 + -7x = -18 + 7x + -7x

Combine like terms: 7x + -7x = 0
21 + -7x = -18 + 0
21 + -7x = -18

Add '-21' to each side of the equation.
21 + -21 + -7x = -18 + -21

Combine like terms: 21 + -21 = 0
0 + -7x = -18 + -21
-7x = -18 + -21

Combine like terms: -18 + -21 = -39
-7x = -39

Divide each side by '-7'.
x = 5.571428571

Simplifying
x = 5.571428571

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