Answer:

Step-by-step explanation:

Distribute:

Combine like terms:

-2r + 4 is your answer.
1230 1203 1302 1320 1032 1023 2130 2103 2301 2310 2032 2023 3210 etc
The left side can be written as a square. We can take the square root, then subtract 1.
... (x +1)² = 17
... x +1 = ±√17
... x = -1 ±√17
Because 16/5 and 48/15 are equivalent fractions
100(12 / 82) = 14.6% approximately.