can any one please help me

Question

oleg3321 · Answer

A system of equations is given below.
2x + 7y = 1
-3x – 4y = 5

    Create an equivalent system of equations by replacing the first equation by multiplying the first equation by an integer other than 1, and adding it to the second equation.
    Use any method to solve the equivalent system of equations (the new first equation with the original second equation).
    Prove that the solution for the equivalent system is the same as the solution for the original system of equations.

oleg3321 · Answer

@Hero @kade_sonix @nikato @satellite73

anonymous · Answer

try multiplying the first one by 3 and the second one by  2

oleg3321 · Answer

ok then what

anonymous · Answer

add in a column , the $x$ terms will add up to zero and you will be left with an equation in $y$ only

oleg3321 · Answer

can you please show me how

anonymous · Answer

$$2x + 7y = 1\ -3x – 4y = 5 $$
$$6x+21y=3\
-6x-8y=10$$

anonymous · Answer

add in a column you get 
$$13y=13$$ so $y$ should be obvious

oleg3321 · Answer

its 1 right?

anonymous · Answer

yes

oleg3321 · Answer

okay so thats the answer for the first one right

oleg3321 · Answer

@satellite73