A : 25/5 is equivalent to 30/6
The equations state -5(3s-9)=23. So 1st you wanna multiply 3s and -9 by -5. Which would get you -15s+45=23.
Than you subtract 23 from 45 which would equal -22 and than divide 15 from that
So the equation would equal 1.47
Answer:
Discount-.15*70=<u>10.50</u>
Final price-70-10.5=<u>59.5</u>
C=0.10x+25
nothing changes except the monthly fee so just replace the old with the new