Question

help please with algebra?

Answer 1

What question do you have

Answer 2

SOLVING FOR A VARIABLE AND USING SUBSTITUTION:
VALUE OF X:

(a) 3x-9y=3

(b)7x-3y=20

(c)y=1/2x

Answer 3

Just need help with those 3 if you could

Answer 4

Which variable do you want to solve for in example a?

Answer 5

x

Answer 6

7x-3(1/2x)=20
solve for x

Answer 7

x for all of thema, b and c c:

Answer 8

5.5x=20
so x= 20/5.5

Answer 9

@ hdalton ty !

Answer 10

now i just need a

Answer 11

Replace y with 1/2 x

Answer 12

so it would be 3x-(1/2x)=3 ?

Answer 13

@Mertsj

Answer 14

I believe that in a it says to multiply the y value by -9. That's what -9y means: multiply y by -9

Answer 15

@Mertsj Ty!

Answer 16

yw