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<X = 48°

<Y  = 96°

<Z  = 36°

Step-by-step explanation:

<X +<Y+<Z = 180

3.2n + 6.4n + 2.4n = 180

12n = 180

n = 15

<X = 3.2(15) = 48

<Y = 6.4(15) = 96

<Z = 2.4(15) = 36

<X =48

<Y  =96

<Z = 36

Step-by-step explanation:

The three angles of a triangle add to 180 degrees

3.2n + 6.4n +2.4n = 180

Combine like terms

12n = 180

Divide each side by 12

12n/12 =180/12

n =15

<X = 3.2 n = 3.2 *15 =48

<Y = 6.4 n = 3.2 * 15 =96

<Z = 2.4 n = 2.4 * 15 =36