5(x-1)+7=21

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Solution for 5(x-1)+7=21 equation:


Simplifying
5(x + -1) + 7 = 21

Reorder the terms:
5(-1 + x) + 7 = 21
(-1 * 5 + x * 5) + 7 = 21
(-5 + 5x) + 7 = 21

Reorder the terms:
-5 + 7 + 5x = 21

Combine like terms: -5 + 7 = 2
2 + 5x = 21

Solving
2 + 5x = 21

Solving for variable 'x'.

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

Add '-2' to each side of the equation.
2 + -2 + 5x = 21 + -2

Combine like terms: 2 + -2 = 0
0 + 5x = 21 + -2
5x = 21 + -2

Combine like terms: 21 + -2 = 19
5x = 19

Divide each side by '5'.
x = 3.8

Simplifying
x = 3.8

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