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Usury 1817 could help62625[617]
Step-by-step explanation:
6x+3y=54
- 2x+y=18
I'm going to be using the elimination method cause it seems easiest here. so for the elimination method u choose a variable to eliminate I chose y u could do x too if u want to. so first step would be to multiply the second equation by 3. 6x+3y=54
so now u just have to eliminate
6x+3y=54
- 6x+3y=54
because these cancel out the answer would be an infinite solution
Hey there!
4x - 9 = 15
ADD 9 to BOTH SIDES
4x - 9 + 9 = 15 + 9
CANCEL out: -9 + 9 because it gives you 0
KEEP: 15 + 9 because it help solve for the x-value.
NEW EQUATION: 4x = 15 + 9
SIMPLIFY IT!
4x = 24
DIVIDE 4 to BOTH SIDES
4x/4 = 24/4
CANCEL out: 4/4 because it gives you 1
KEEP: 24/4 because it gives you the answer of the x-value
NEW EQUATION: x = 24/4
SIMPLIFY IT!
x = 6
Therefore, your answer is: x = 6 (Option D.)
Good luck on your assignment and enjoy your day!
~Amphitrite1040:)
Let us suppose a system of two equations with two unknowns.
Suppose further that the system of equations is linearly independent.
When the system of equations has a variable that has exactly the same coefficient in both equations, then the most effective method to solve the system of equations is subtracting.
This is because we eliminate one of the variables and reduce the system to an equation with one unknown.
Answer:
a system of equations in which subtraction would be the most efficient way of solving the system is:
A system of equations in which one of the variables has exactly the same coefficient in both equations.