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Tyson began solving the system ​ {4x+2y=64x+5y=15 ​ by writing −3y=−9 . Which property justifies this step? division property of equality multiplication property of equality substitution property of equality
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Tyson began solving the system ​ {4x+2y=64x+5y=15 ​ by writing −3y=−9 .

Which property justifies this step?

division property of equality
multiplication property of equality
substitution property of equality
subtraction property of equality

User MEMark
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2 Answers

2 votes

Answer:

subtraction property of equality

Explanation:

...

User Jenssen
by
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3 votes
4x+2y=6 (1)
4x+5y=15 (2)

1) - (2) =4x-x4 +2y -5y = 6 - 15
equivalent to -3y= -9
so the true answer is subtraction property of equality
User Songhir
by
8.2k points
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