# 400-2a=244

## Enter Equation or Inequality

Solve the following equation
400-2a=244

Solve for a
400 - 2a = 244

## Group constants

Group our constants 400 and 244.
subtract 400 from both sides
-2a + 400 - 400 = 244 - 400

-2a = -156

## Divide each side of the equation by -2

 -2a -2
 =
 -156 -2

a = 78

a = 78

### 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?

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

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### 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