Petro was given this system of equations. -14x-2y = 2414x+8y = -12Petro’s work is shown in the table. Where, if anywhere, did Petro first make a mistake? -A) step 1B) step 2C) step 3D) no mistake
Accepted Solution
A:
Answer:Option C step 3Step-by-step explanation:we have-14x-2y=24 ------> equation A14x+8y=-12 -----> equation Bstep 1Solve the system by eliminationAdds equation A and equation B-14x-2y=2414x+8y=-12----------------------2y+8y=24-126y=12The step 1 is correctstep 2Solve for yDivide by 6 both sides6y/6=12/6y=2The step 2 is correctstep 3Find the value of xsubstitute the value of y in the equation A-14x-2(2)=24-14x-4=2414x=-4-2414x=-28x=-2The step 3 is not correctthereforePetro first make a mistake in Step 3