Q. \begin{aligned} 3x-4y&=10 \newline 2x-4y&=6 \end{aligned}If x satisfies the given system of equations, what is the value of x?
Eliminate y by subtraction: Subtract the second equation from the first to eliminate y: (3x−4y)−(2x−4y)=10−6.
Perform subtraction: Perform the subtraction: 3x−2x=10−6.
Simplify to find x: Simplify the equation: x=4.
Check solution for x: Check the solution by plugging x=4 into the original equations.
Check solution for y: For the first equation: 3(4)−4y=10, which simplifies to 12−4y=10.
Verify correctness: For the second equation: 2(4)−4y=6, which simplifies to 8−4y=6.
Verify correctness: For the second equation: 2(4)−4y=6, which simplifies to 8−4y=6. Both equations should be true if x=4 is the correct solution. Let's check if they give the same value for y.
Verify correctness: For the second equation: 2(4)−4y=6, which simplifies to 8−4y=6. Both equations should be true if x=4 is the correct solution. Let's check if they give the same value for y. From the first equation, 12−4y=10, we get 4y=12−10, which simplifies to 4y=2.
Verify correctness: For the second equation: 2(4)−4y=6, which simplifies to 8−4y=6. Both equations should be true if x=4 is the correct solution. Let's check if they give the same value for y. From the first equation, 12−4y=10, we get 4y=12−10, which simplifies to 4y=2. From the second equation, 8−4y=6, we get 4y=8−6, which simplifies to 4y=2.
Verify correctness: For the second equation: 2(4)−4y=6, which simplifies to 8−4y=6. Both equations should be true if x=4 is the correct solution. Let's check if they give the same value for y. From the first equation, 12−4y=10, we get 4y=12−10, which simplifies to 4y=2. From the second equation, 8−4y=6, we get 4y=8−6, which simplifies to 4y=2. Both equations give 4y=2, which means 8−4y=61.
Verify correctness: For the second equation: 2(4)−4y=6, which simplifies to 8−4y=6. Both equations should be true if x=4 is the correct solution. Let's check if they give the same value for y. From the first equation, 12−4y=10, we get 4y=12−10, which simplifies to 4y=2. From the second equation, 8−4y=6, we get 4y=8−6, which simplifies to 4y=2. Both equations give 4y=2, which means 8−4y=61. Simplify 8−4y=61 to get 8−4y=63.
Verify correctness: For the second equation: 2(4)−4y=6, which simplifies to 8−4y=6. Both equations should be true if x=4 is the correct solution. Let's check if they give the same value for y. From the first equation, 12−4y=10, we get 4y=12−10, which simplifies to 4y=2. From the second equation, 8−4y=6, we get 4y=8−6, which simplifies to 4y=2. Both equations give 4y=2, which means 8−4y=61. Simplify 8−4y=61 to get 8−4y=63. Since both x=4 and 8−4y=63 satisfy the original equations, there is no math error, and the solution is correct.
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