Math, asked by mysteriousboy69, 9 months ago

how to know that we had to add or subtract the equation ?

Answers

Answered by piyushkumarprajapati

Answer:

If the two equations are 2x+3y=4 and 5x+3y=7 , then we will have two subtract the two as the common terms in the equation are both of same sign . However if the equations were 2x+3y=4 and 5x-3y=7 , then we would have to add the two equation cause the common factors (3y) have opposite signs.

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