Enter Equation or Inequality

Solve the following equation


Solve for b

80 - 2b = b + 5

Group variables

Group our variables -2b and b
subtract b from both sides

-2b + 80 - b = b + 5 - b

Cancel b on the right side:

-3b + 80 = 5

Group constants

Group our constants 80 and 5.
subtract 80 from both sides

-3b + 80 - 80 = 5 - 80

Cancel 80 on the left side:

-3b = -75

Divide each side of the equation by -3


b = 25

Final Answer

b = 25

What is the Answer?
b = 25
How does the Equation and Inequalities Calculator work?
Free Equation and Inequalities Calculator - Solves an equation or inequality with 1 unknown variable and no exponents as well as certain absolute value equations and inequalities such as |x|=c and |ax| = c where a and c are constants. Solves square root, cube root, and other root equations in the form ax^2=c, ax^2 + b = c. Also solves radical equations in the form asqrt(bx) = c. Also solves open sentences and it will solve one step problems and two step equations. 2 step equations and one step equations and multi step equations
This calculator has 1 input.

What 3 formulas are used for the Equation and Inequalities Calculator?

One Step Equations (Division): cx = b x = b/c
One Step Equations (Addition): x + c = b x = b - c
One Step Equations (Subtraction): x - c = b x = b + c

For more math formulas, check out our Formula Dossier

What 4 concepts are covered in the Equation and Inequalities Calculator?

a statement declaring two mathematical expressions are equal
equation and inequalities
a number or value we do not know
Alphabetic character representing a number
Example calculations for the Equation and Inequalities Calculator
Equation and Inequalities Calculator Video


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