if 9 a - b = 10 b + 80 = - 12 b - 2 a , what is the value of 2 a + 22 b ?
"this implies 9 a - b = 10 b + 80 , 9 a - b = - 12 b - 2 a , 10 b + 80 = - 12 b - 2 a manipulating the second equation gives us 10 b + 80 = - 12 b - 2 a = = > 2 a + 22 b = - 80 answer is c"
multiply(negate(multiply(divide(80, 2), 2)), 2)