Find the value of x, y, z for the given system of equations : 2x+3y+2z=50, x+4y+3z=40, 3x+3y+5z=60
Correct Answer :
x=125/8, y=15/2, z=-(15/8)
Solution :
The correct option is: x=125/8, y=15/2, z=-(15/8).
To find the values of , , and , we can solve the given system of linear equations step-by-step:
Equation 1:
Equation 2:
Equation 3:
Step 1: Eliminate one variable from the equations.
Let us eliminate using Equation 2. From Equation 2, we can express in terms of and :
Step 2: Substitute this expression for into Equation 1 and Equation 3.
Substituting into Equation 1:
Simplifying:
Subtract 80 from both sides:
Multiplying by -1 gives Equation 4:
Substituting into Equation 3:
Simplifying:
Subtract 120 from both sides:
Multiplying by -1 gives Equation 5:
Step 3: Solve the system of two equations (Equation 4 and Equation 5).
Subtract Equation 4 from Equation 5:
Step 4: Find using the value of .
Substitute into Equation 4:
Step 5: Find using the values of and .
Substitute and into Equation 2:
Thus, the final values are , , and .
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