Question

$3y {}^{2} - 20 = 160 - 2y ^{2}$
​

Answer 1

Answer:

y = +6 or -6

Step-by-step explanation:

3y² - 20 = 160 - 2y²

3y² + 2y² = 160 + 20

5y² = 180

y² = 180/5

y² = 36

y = 6