A Math 8: MP3 F... Tofayl Khan - MUD9LSN18- S22Step 1: Choose one equation to begin. (Suggestion: Choose the equation thathas a variable already isolated or close to being isolated.).y = 2x – 12x + 5y = 7Step 2: Is a variable isolated?If Yes, continue to Step 3.If No, isolate one of the variables.Step 3: Box the expression that is equal to the isolated variable.Step 4: Using the other equation,substitute the boxed expression for the equations, substitute the known valueisolated variable and solve for the only and solve for the unknown value.variable left.Step 5: Using either of the originalStep 6: Check your solution and writeyour answer:acer

Answered: Step 1: Choose one equation to begin.…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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A Math 8: MP3 F... Tofayl Khan - MUD9LSN18- S22
Step 1: Choose one equation to begin. (Suggestion: Choose the equation that
has a variable already isolated or close to being isolated.).
y = 2x – 1
2x + 5y = 7
Step 2: Is a variable isolated?
If Yes, continue to Step 3.
If No, isolate one of the variables.
Step 3: Box the expression that is equal to the isolated variable.
Step 4: Using the other equation,
substitute the boxed expression for the equations, substitute the known value
isolated variable and solve for the only and solve for the unknown value.
variable left.
Step 5: Using either of the original
Step 6: Check your solution and write
your answer:
acer

Expert Solution

Step 1

Step-1. given system of equations

$\begin{array}{rcl} y & = & 2 x - 1 \\ 2 x + 5 y & = & 7 \end{array}$

Step-2. in first equation variables are isolated.

Step-3. $y = 2 x - 1$

Step-4. we are putting isolated variable equation into other

$\begin{array}{rcl} 2 x + 5 y & = & 7 \\ 2 x + 5 (2 x - 1) & = & 7 \\ 2 x + 10 x - 5 & = & 7 \\ 12 x & = & 7 + 5 = 12 \\ 12 x & = & 12 \\ x & = & \frac{12}{12} \\ x & = & 1 \end{array}$

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