Enter Equation or Inequality
  

Solve the following equation

15u+640=55u

Solve for u

15u + 640 = 55u

Group variables

Group our variables 15u and 55u
subtract 55u from both sides

15u + 640 - 55u = 55u - 55u

Cancel 55u on the right side:

-40u + 640 = 0

Group constants

Group our constants 640 and 0.
subtract 640 from both sides

-40u + 640 - 640 = 0 - 640

Cancel 640 on the left side:

-40u = -640

Divide each side of the equation by -40

-40u
-40
=
  
-640
-40

u = 16

Final Answer

u = 16


You have 2 free calculationss remaining




What is the Answer?
u = 16
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?

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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