25x-15+3x+21=90

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Solution for 25x-15+3x+21=90 equation:


Simplifying
25x + -15 + 3x + 21 = 90

Reorder the terms:
-15 + 21 + 25x + 3x = 90

Combine like terms: -15 + 21 = 6
6 + 25x + 3x = 90

Combine like terms: 25x + 3x = 28x
6 + 28x = 90

Solving
6 + 28x = 90

Solving for variable 'x'.

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

Add '-6' to each side of the equation.
6 + -6 + 28x = 90 + -6

Combine like terms: 6 + -6 = 0
0 + 28x = 90 + -6
28x = 90 + -6

Combine like terms: 90 + -6 = 84
28x = 84

Divide each side by '28'.
x = 3

Simplifying
x = 3

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