2x-21+5x+75=90

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Solution for 2x-21+5x+75=90 equation:


Simplifying
2x + -21 + 5x + 75 = 90

Reorder the terms:
-21 + 75 + 2x + 5x = 90

Combine like terms: -21 + 75 = 54
54 + 2x + 5x = 90

Combine like terms: 2x + 5x = 7x
54 + 7x = 90

Solving
54 + 7x = 90

Solving for variable 'x'.

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

Add '-54' to each side of the equation.
54 + -54 + 7x = 90 + -54

Combine like terms: 54 + -54 = 0
0 + 7x = 90 + -54
7x = 90 + -54

Combine like terms: 90 + -54 = 36
7x = 36

Divide each side by '7'.
x = 5.142857143

Simplifying
x = 5.142857143

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