Use elimination to solve the following system of
equations: 17x - 2y = 25
17x + 3y = 5

Step-by-step explanation:

Both equations have a term in them, so if we subtract the second equation from the first, it will eliminate those terms, allowing us to solve for the remaining terms:

Finally, we can plug this value for into either of the two original equations to solve for :

This means the solution to the system of equations is .

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

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