Choose the correct option
for the standard form of the following linear equations. 5x = -7y + 9
a) 5x+7y=9 b) 5x – 7y =9 c) 5x-7y+9 =0 d) 5x +7y+9 =0
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Correct option is
A
5x + 7y = 79, where x = cost of a book and y = cost of a pen.
The cost of 1 book=x
The cost of 1 pen=y
Then the linear equation is ⇒5x+7y=79
Step-by-step explanation:
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