Question

Does anyone know how to do system equations but with 3 of them?

A) Yes, by substitution or elimination method
B) No, it's only possible with two equations
C) Three equations can't be solved together
D) Solving three equations requires advanced calculus

Answer 1

A system of three equations with three unknowns can be solved using substitution or elimination methods, involving algebraic steps without the need of advanced calculus.

Step-by-step explanation:

To solve a system of three equations with three unknowns, you can use methods such as substitution or elimination. Here's a basic outline:

1. Identify the unknowns and the knowns within the equations.
2. Choose one of the equations and solve it for one of the variables.
3. Substitute the expression from step 2 into the other equations to reduce the number of unknowns in those equations.
4. Now with two equations and two unknowns, you can either continue with substitution or use the elimination method to solve for one of the remaining unknowns.
5. Substitute the value found in step 4 into one of the equations to find another unknown.
6. Finally, substitute the two known values into one of the original equations to solve for the third unknown.
7. Check your solutions by plugging them back into the original equations to ensure they all satisfy the system of equations.

This method does not require advanced calculus; rather, it's a matter of applying algebra systematically.