Enter Equation or Inequality
  

Solve the following equation

d+d+45=85

Solve for d

d + d + 45 = 85

Group the d terms on the left:

(1 + 1)d = 2d

Form modified equation

2d + 45 = + 85

Group constants

Group our constants 45 and 85.
subtract 45 from both sides

2d + 45 - 45 = 85 - 45

Cancel 45 on the left side:

2d = 40

Divide each side of the equation by 2

2d
2
=
  
40
2

d = 20

Final Answer

d = 20


You have 2 free calculationss remaining




What is the Answer?
d = 20
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
Example calculations for the Equation and Inequalities Calculator

Equation and Inequalities Calculator Video


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