math
posted by HELP me please asap!! .
PLEASE!!!!i need help on these 4:
*4y=153x
2y=3x+21
*4x=5y14
y=6x9
*5x=4y30
2x=3y=12
*2/3y=10+4x
5x=1/3y8
use linear combinations to solve the system of linear equations
thank you!!!

4y=153x
2y=3x+21
4y=153x Divide with 2
2y=(15/2)(3/2)x
2y=(15/2)(3/2)x=3x+21
(15/2)21=3x+(3/2)x
(15/2)(42/2)=(6/2)x(3/2)x
(27/2)=(9/2)x Multiply with 2
27=9x Divide with 9
x= 3
2y=3x+21
2y=3*(3)+21
2y= 9+21
2y= 12 Divide with 2
y=6