Which expression represents the phrase "one third the sum of 12 and a number"? a.) 1/3+12+x b.) 1/3(12+x) c.) 1/3x+12 d.) 1/3(12)+x

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.