7(x-3)+7(x-2)+7(x-1)=57

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Solution for 7(x-3)+7(x-2)+7(x-1)=57 equation:


Simplifying
7(x + -3) + 7(x + -2) + 7(x + -1) = 57

Reorder the terms:
7(-3 + x) + 7(x + -2) + 7(x + -1) = 57
(-3 * 7 + x * 7) + 7(x + -2) + 7(x + -1) = 57
(-21 + 7x) + 7(x + -2) + 7(x + -1) = 57

Reorder the terms:
-21 + 7x + 7(-2 + x) + 7(x + -1) = 57
-21 + 7x + (-2 * 7 + x * 7) + 7(x + -1) = 57
-21 + 7x + (-14 + 7x) + 7(x + -1) = 57

Reorder the terms:
-21 + 7x + -14 + 7x + 7(-1 + x) = 57
-21 + 7x + -14 + 7x + (-1 * 7 + x * 7) = 57
-21 + 7x + -14 + 7x + (-7 + 7x) = 57

Reorder the terms:
-21 + -14 + -7 + 7x + 7x + 7x = 57

Combine like terms: -21 + -14 = -35
-35 + -7 + 7x + 7x + 7x = 57

Combine like terms: -35 + -7 = -42
-42 + 7x + 7x + 7x = 57

Combine like terms: 7x + 7x = 14x
-42 + 14x + 7x = 57

Combine like terms: 14x + 7x = 21x
-42 + 21x = 57

Solving
-42 + 21x = 57

Solving for variable 'x'.

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

Add '42' to each side of the equation.
-42 + 42 + 21x = 57 + 42

Combine like terms: -42 + 42 = 0
0 + 21x = 57 + 42
21x = 57 + 42

Combine like terms: 57 + 42 = 99
21x = 99

Divide each side by '21'.
x = 4.714285714

Simplifying
x = 4.714285714

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