# b+b-15=75

## Enter Equation or Inequality

Solve the following equation
b+b-15=75

Solve for b
b + b - 15 = 75

(1 + 1)b = 2b

2b - 15 = + 75

## Group constants

Group our constants -15 and 75.
add 15 to both sides
2b - 15 + 15 = 75 + 15

2b = 90

## Divide each side of the equation by 2

 2b 2
 =
 90 2

b = 45

b = 45

### 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

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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