Solve the simultaneous equations by substitution
5x+6y=−11
5x=2y−3

Step-by-step explanation:

we have

5x+6y= -11

5x-2y=-3

we will multiply first equation with -1

-5x-6y=11  and add it with the second

5x-2y=-3

-8y=8

y=-1

we go to our original equation and replace y=-1

5x-6=-11

5x=-11+6

5x=-5

x=-1

y= -1, x= -1

5x+6y=-11

-(5x-2y=-3)

     8y=-8

      y=-8/8

      y= -1

5x+6(-1)=-11

5x-6     = -11

        5x=-11+6

        5x=-5

          x=-5/5

          x=-1

b

step-by-step explanation:

3-4

step-by-step explanation:

the answer is 3-4 because both 45 and 60 has a multiple of 15.

45/3=15

60/4=15

therefore the odds against selecting a red is 4-3