Mathematics
Mathematics, 19.03.2020 10:32, omar1511

Finish solving the system of equations 3x + 5y = βˆ’72 and 2x + 3y = –45 using the linear combination method.

Step 1: Create an equivalent system with opposite terms:
βˆ’2(3x + 5y = βˆ’72) β†’ βˆ’6x βˆ’ 10y = 144
3(2x + 3y = βˆ’45) β†’ 6x + 9y = βˆ’135

Step 2: Add the equivalent system of equations to eliminate a variable: βˆ’y = 9

Step 3: Solve for the first unknown variable: y = βˆ’9

Step 4: Substitute the value of the first variable into one of the original equations: 2x + 3(βˆ’9) = βˆ’45

Step 5: Solve for the second unknown variable and write the solution as an ordered pair:

What is the solution to the system?

answer
Answers: 3

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Finish solving the system of equations 3x + 5y = βˆ’72 and 2x + 3y = –45 using the linear combination...

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