##### Enter Equation or Inequality

Solve the following equation

750-25c+20c=690

Solve for c

750 - 25c + 20c = 690

##### Group the c terms on the left:

(-25 + 20)c = -5c

##### Form modified equation

-5c + 750 = + 690

##### Group constants

Group our constants 750 and 690.
subtract 750 from both sides

-5c + 750 - 750 = 690 - 750

-5c = -60

 -5c -5
 =
 -60 -5

c = 12

c = 12

c = 12
##### 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?

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