Question

I need help with elimination.

Answer 1

7x + 4y = -3

-7x + 5y = 12

add the two equations in order to cancel out a variable

9y=9

y=1

then substitute for either equation

7x + 4(1) = -3

7x + 4 = -3

7x=-7

x=-1

(-1,1)

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