Question

solve system of equations.
3x-4y=25
3x+2y=1
A.(1,-1)
B.(3,-4)
C.(-3,-9)
D.(7,-1)
hellp this is IMPORTANT

Answer 1

do you know matrices

Answer 2

NO

Answer 3

i would suggest then, get one equation and make 3x the subject.

Answer 4

ok

Answer 5

so 3x=25+4y

Answer 6

now substitute that into the second equation

Answer 7

25+4y+2y=1

Answer 8

ok

Answer 9

cool

Answer 10

6y=-24
y=-4

Answer 11

since y=-4 is the only y-coordinate in B and not the rest then B is ur answer, but check for x-coorindate

Answer 12

ight thanks