Solve each system of equation by elimination: Show work and steps.

31. 3x + 5y = 6
2x - 4y = -7

Question

Solve each system of equation by elimination: Show work and steps.

31. 3x + 5y = 6
      2x - 4y = -7

jackellyn · Answer

Multiply the first one by 2 and the second by 3

firejay5 · Answer

do you mean -3 @jackellyn

hana88 · Answer

no the first 1 should be multiplied by -2

hana88 · Answer

or what fire ay said

firejay5 · Answer

why is it * by -2

hana88 · Answer

because you need to make the first term the opposite of the second term to cancel it out

firejay5 · Answer

did I do that right @jackellyn

jackellyn · Answer

that is right @hana88 and @Firejay5 one does have to be negative

anonymous · Answer

(3x+5y=6) multiply by -2 you get -6x-10y=-12
(2x-4y=-7) multiply by 3 you get 6x-12y=-21

by solving the above 2 equations you get  y= -33/-22=3/2

substituting y = 3/2 in the 2nd eqn.  you get x=-1/2