Enter Equation or Inequality

Solve the following equation


Solve for r

2r + 39 = 3r + 10

Group variables

Group our variables 2r and 3r
subtract 3r from both sides

2r + 39 - 3r = 3r + 10 - 3r

Cancel 3r on the right side:

-r + 39 = 10

Group constants

Group our constants 39 and 10.
subtract 39 from both sides

-r + 39 - 39 = 10 - 39

Cancel 39 on the left side:

-r = -29

Divide each side of the equation by -1


r = 29

Final Answer

r = 29

What is the Answer?
r = 29
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
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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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