Find expert advice and community support for all your questions on IDNLearn.com. Ask any question and get a detailed, reliable answer from our community of experts.
Sagot :
To solve the system of equations
[tex]\[ 3x - 2y = 4 \][/tex]
[tex]\[ 2x + 3y = -6 \][/tex]
we need to find the values of [tex]\(x\)[/tex] and [tex]\(y\)[/tex] that satisfy both equations simultaneously. Here is the step-by-step solution:
1. Multiply the first equation by 3 and the second equation by 2 to align the coefficients of [tex]\(x\)[/tex]:
[tex]\[ 3(3x - 2y) = 3(4) \][/tex]
[tex]\[ 9x - 6y = 12 \][/tex]
[tex]\[ 2(2x + 3y) = 2(-6) \][/tex]
[tex]\[ 4x + 6y = -12 \][/tex]
2. Add the new equations together to eliminate [tex]\(y\)[/tex]:
[tex]\[ (9x - 6y) + (4x + 6y) = 12 + (-12) \][/tex]
[tex]\[ 9x + 4x - 6y + 6y = 0 \][/tex]
[tex]\[ 13x = 0 \][/tex]
3. Solve for [tex]\(x\)[/tex]:
[tex]\[ x = 0 \][/tex]
4. Substitute [tex]\(x = 0\)[/tex] back into one of the original equations to solve for [tex]\(y\)[/tex]. We'll use the first equation [tex]\(3x - 2y = 4\)[/tex]:
[tex]\[ 3(0) - 2y = 4 \][/tex]
[tex]\[ -2y = 4 \][/tex]
5. Solve for [tex]\(y\)[/tex]:
[tex]\[ y = -2 \][/tex]
Thus, the value of [tex]\(y\)[/tex] is
[tex]\[ \boxed{-2} \][/tex]
Therefore, the correct answer is:
(c) -2
[tex]\[ 3x - 2y = 4 \][/tex]
[tex]\[ 2x + 3y = -6 \][/tex]
we need to find the values of [tex]\(x\)[/tex] and [tex]\(y\)[/tex] that satisfy both equations simultaneously. Here is the step-by-step solution:
1. Multiply the first equation by 3 and the second equation by 2 to align the coefficients of [tex]\(x\)[/tex]:
[tex]\[ 3(3x - 2y) = 3(4) \][/tex]
[tex]\[ 9x - 6y = 12 \][/tex]
[tex]\[ 2(2x + 3y) = 2(-6) \][/tex]
[tex]\[ 4x + 6y = -12 \][/tex]
2. Add the new equations together to eliminate [tex]\(y\)[/tex]:
[tex]\[ (9x - 6y) + (4x + 6y) = 12 + (-12) \][/tex]
[tex]\[ 9x + 4x - 6y + 6y = 0 \][/tex]
[tex]\[ 13x = 0 \][/tex]
3. Solve for [tex]\(x\)[/tex]:
[tex]\[ x = 0 \][/tex]
4. Substitute [tex]\(x = 0\)[/tex] back into one of the original equations to solve for [tex]\(y\)[/tex]. We'll use the first equation [tex]\(3x - 2y = 4\)[/tex]:
[tex]\[ 3(0) - 2y = 4 \][/tex]
[tex]\[ -2y = 4 \][/tex]
5. Solve for [tex]\(y\)[/tex]:
[tex]\[ y = -2 \][/tex]
Thus, the value of [tex]\(y\)[/tex] is
[tex]\[ \boxed{-2} \][/tex]
Therefore, the correct answer is:
(c) -2
Thank you for contributing to our discussion. Don't forget to check back for new answers. Keep asking, answering, and sharing useful information. Discover insightful answers at IDNLearn.com. We appreciate your visit and look forward to assisting you again.