The sum of a number x and 12 equals 15

What is the value of x in the following equation? -3x-2=2x+8

Justin has 750 more than eva and eva has 12 less than justin together they have a total of 63 how much money did

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b