It will take 7 weeks and both will have $610
30x7=210+400=610
55x7=385+225=610
Answer:
D. All if the choices , credit cars , banks and issuer banks
<span>7x-4y=-7
5x+y=22
multiply 4 on the 2nd equation
</span>20x+ 4y=88
now you have
7x -4y = -7
20x + 4y = 88
--------------------add
27x = 81
x = 3
7x-4y=-7
7(3)-4y=-7
-4y = -28
y = 7
answer (3, 7) is the solution