Question

Solve the system using elimination.

5x+4y=12
3x-3y=18

Answer 1

hi,
take
5x + 4y = 12 ----(1)
3x - 3y = 18 ---(2)

now multiply (2) by 4 and u will get
12x -12y = 72 ----(3)

also... multiply (1) by 3 and u will get..
15x +12y = 36 ----(4)

now add (3) and (4)... ya will find out that "y" will be eliminated ... now solve it for "x"..
Did ya get it???

Answer 2

So would x=-36?

Answer 3

well i was still doing the equation the other guy showed. sorry. then x=4

Answer 4

i mean 3

Answer 5

@radar mmmm.... there is smthing wrong....

Answer 6

how can u get x - y = 3 by
dividing 3x-3y=18 by 3?????

Answer 7

Did you try 3 and solve for y, lets see 5(3) +4y =12
15 + 4y = 12
4y = -3
y = - OOOOOOh NOOOOO made error that should be 6 Sorry about that

Answer 8

im getting so confused

Answer 9

@JjJustin the division the 2nd formula, there was an error

Answer 10

Divide the 2nd equation by 3 getting x - y = 3
is wrong............
u will get
x-y = 6

Answer 11

ok

Answer 12

Divide the 2nd equation by 3 getting x - y = 6
Now multiply this by 4 getting 4x -4y = 12 Now add the first equation to eliminate.
4x+4y = 24
------------
8x = 36 solve for x and substitute the value of x in one of the original equation and solve for y.

Answer 13

Thanks @***[ISURU]*** I made an error which blew the solution.