 # Use Cramers Method to solve a+c=281 and 4a + 1.5c = 784

<-- Equation 1
<-- Equation 2

## Use Cramers method to solve:

a + c = 281
4a + 1.5c = 784

Equation 1 is in the correct format.
Equation 2 is in the correct format.

## Find a, b, c in ax + by = c

a + c = 281
a = 1, b = 1, c = 281

## Find d, e, f in dx + ey = f

4a + 1.5c = 784
d = 4, e = 1.5, f = 784

## Step 1, calculate Delta (Δ):

Δ = a * e - b * d
Δ = (1 * 1.5) - (1 * 4)
Δ = 1.5 - 4
Δ = -2.5

## Step 2, calculate the numerator for a

Numerator(a) = c * e - b * f
Numerator(a) = (281 * 1.5) - (1 * 784)
Numerator(a) = 421.5 - 784
Numerator(a) = -362.5

## Step 3, calculate the numerator for c

Numerator(c) = a * f - c * d
Numerator(c) = (1 * 784) - (281 * 4)
Numerator(c) = 784 - 1124
Numerator(c) = -340

## Evaluate and solve:

 a  = Numerator(a) Δ

 a  = -362.5 -2.5

 c  = Numerator(c) Δ

 c  = -340 -2.5

Solve using Gauss Jordan Elimination

c = 136

### How does the Simultaneous Equations Calculator work?

Free Simultaneous Equations Calculator - Solves a system of simultaneous equations with 2 unknowns using the following 3 methods:
1) Substitution Method (Direct Substitution)
2) Elimination Method
3) Cramers Method or Cramers Rule Pick any 3 of the methods to solve the systems of equations 2 equations 2 unknowns
This calculator has 2 inputs.

### What 1 formula is used for the Simultaneous Equations Calculator?

1. Δ = a * e - b * d

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### What 7 concepts are covered in the Simultaneous Equations Calculator?

cramers rule
an explicit formula for the solution of a system of linear equations with as many equations as unknowns
eliminate
to remove, to get rid of or put an end to
equation
a statement declaring two mathematical expressions are equal
simultaneous equations
two or more algebraic equations that share variables
substitute
to put in the place of another. To replace one value with another
unknown
a number or value we do not know
variable
Alphabetic character representing a number