if 9 a - b = 10 b + 50 = - 12 b - 2 a , what is the value of 11 a + 11 b ?
this implies 9 a - b = 10 b + 50 , 9 a - b = - 12 b - 2 a , 10 b + 50 = - 12 b - 2 a manipulating the second equation gives us 9 a - b = - 12 b - 2 a = = > 11 a + 11 b = 0 answer is c
multiply(negate(multiply(divide(50, const_2), const_2)), 11)