Solve the system of equations and choose the correct ordered pair.3x + 4y = 385x – 5y = –30A.(2, 6)B.(3, 9)C.(2, 8)D.(3, 4)SUBMITarrow_backPREVIOUS
Question
Solve the system of equations and choose the correct ordered pair.3x + 4y = 385x – 5y = –30A.(2, 6)B.(3, 9)C.(2, 8)D.(3, 4)SUBMITarrow_backPREVIOUS
Solution
To solve the system of equations, we can use either substitution or elimination method. Here, I will use the elimination method.
The system of equations is:
3x + 4y = 38 5x - 5y = -30
First, we can multiply the first equation by 5 and the second equation by 3 to make the coefficients of x the same in both equations:
15x + 20y = 190 15x - 15y = -90
Now, subtract the second equation from the first:
15x + 20y - (15x - 15y) = 190 - (-90) 15x + 20y - 15x + 15y = 190 + 90 35y = 280
Divide by 35 to solve for y:
y = 280 / 35 y = 8
Substitute y = 8 into the first equation to solve for x:
3x + 4*8 = 38 3x + 32 = 38 3x = 38 - 32 3x = 6 x = 6 / 3 x = 2
So, the solution to the system of equations is (2, 8), which corresponds to option C.
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