# 2r+39=3r+10

## Enter Equation or Inequality

Solve the following equation
2r+39=3r+10

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

-r + 39 = 10

## Group constants

Group our constants 39 and 10.
subtract 39 from both sides
-r + 39 - 39 = 10 - 39

-r = -29

## Divide each side of the equation by -1

 -1r -1
 =
 -29 -1

r = 29

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?

1. One Step Equations (Division): cx = b x = b/c
2. One Step Equations (Addition): x + c = b x = b - c
3. 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?

equation
a statement declaring two mathematical expressions are equal
equation and inequalities
unknown
a number or value we do not know
variable
Alphabetic character representing a number