Question

please help me with these problems in the pic down here

Answer 1

Answer:

1•x/3+1=7/15

x/3=7/15-1

x/3=7-15/15

x/3=-8/15

x=-8/5

2•x-4/7-x=5-x+3/3

x-4-7x/7=5-x+3/3

3x-12-21x=35-7x+21

3x-21x+7x-12-35-21=0

10x-21x-12-56=0

-11x-68=0

-11x=68

x=-68/11

3•15y+20=-4+12y

15y-12y=-4-20

3y=-24

y=-24/3

y=-8

4•10x-3x/15=3x-11/5

10x-3x=9x-33

10x-3x-9x=-33

-2x=33

x=-33/2

5•6y+5/3=26-3y/3

6y+5=26-3y

6y+3y=26-5

9y=21

y=21/9

y=7/3