90=10x+21+13

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Solution for 90=10x+21+13 equation:


Simplifying
90 = 10x + 21 + 13

Reorder the terms:
90 = 21 + 13 + 10x

Combine like terms: 21 + 13 = 34
90 = 34 + 10x

Solving
90 = 34 + 10x

Solving for variable 'x'.

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

Add '-10x' to each side of the equation.
90 + -10x = 34 + 10x + -10x

Combine like terms: 10x + -10x = 0
90 + -10x = 34 + 0
90 + -10x = 34

Add '-90' to each side of the equation.
90 + -90 + -10x = 34 + -90

Combine like terms: 90 + -90 = 0
0 + -10x = 34 + -90
-10x = 34 + -90

Combine like terms: 34 + -90 = -56
-10x = -56

Divide each side by '-10'.
x = 5.6

Simplifying
x = 5.6

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