Rob bought a hat and 3 shirts for $35. Dan bought 2 hats and a shirt for $20, Which system of equations can be used to find s, the cost of one shirt, and h, the cost of one hat?
h + 38 = 35
2h + s = 20
h+ 38 = 35
2s + h = 20
8 +3h = 35
28 th = 20
8 + 3h = 35
2h + 8 = 20

i dont understand?

Step-by-step explanation:

8+10

step-by-step explanation:

you multiply 4 by 2 and 5 by 2

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -