Question

what is the solution of the system

5x + 6y = 20 , 9x + 11y = 32

Answer 1

ok
5x+6y=20
9x+11y=32

9(5x+6y) = 9*20
-5(9x+11y)=-5*32

45x+54y=180
-45x-55y=-160
add the equations
-y=20
y=-20
so
5x+6(-20)=20
5x-120=20
5x=140
x=28

Answer 2

ask questions if you dont understand

Answer 3

i think i get this one thanks

Answer 4

alternative :


asks questions too, if you dont understand this :)