Question

help please asap will medal/fan!!

solve using elimination
5x + 4y = 12
3x - 3y = 18

please explain/show each step @texaschic101 @vocaloid

Answer 1

Multiply the first equation by3 and the second equation by 4 and add them

Answer 2

you will get the value of x . and hence putting the value of x in any of the equations you will obtain y

Answer 3

5x + 4y = 12 ---> multiply by 3
3x - 3y = 18 ---> multiply by 4
----------------
15x + 12y = 36 (result of multiplying by 3)
12x - 12y = 72 (result of multiplying by 4)
--------------add
27x = 108
x = 108/27
x = 4

now sub 4 in for x in either of beginning equations
5x + 4y = 12
5(4) + 4y = 12
20 + 4y = 12
4y = 12 - 20
4y = -8
y = -8/4
y = -2

check..
3x - 3y = 18
3(4) - 3(-2) = 18
12 + 6 = 18
18 = 18 (correct)

so x = 4 and y = -2
questions ?

Answer 4

wow that makes sense now, thank you @texaschic101, can i ask you one more question?