Question

Solve by Substitution Method
x - y = 4
3x + 2 y = 27​

Answer 1

Answer:

x=7,y=3

Step-by-step explanation:

3(x-y=4-----(1st)

1(3x+2y=27---(2nd)

3x-3y=12-----(3rd)

3x+2y=27----(4th)

3rd-4th

3x-3y-(3x+2y)=12-27

3x-3y-3x-2y= -15

-5y= -15

y=15/5=3

y=3 value put in 3rd equation

3x-3(3)=12

3x-9=12

3x=12+9

3x=21

x=21/3=7

hope you understand