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3 years ago

10

Solve the system of equation using subtraction 3x+2y=7 y=-3y+11

1 answer:

forsale [732]3 years ago

8 0

Assumig 2nd euqation is y =-3x+11
using subtraction

minus y both sides and minus 11
-3x-y=-11

add to other equation to eliminate y's

-3x-1y=-11
<u>3x+2y=7 +</u>
0x+1y=-4

y=-4

sub back

y=-3x+11
-4=-3x+11
minus 11 both sides
-15=3x
divide both sides by 3
-5=x

(x,y)
(-5,-4)

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