John has 13 boxes of apples. each box holds 6 apples. if 7 of the boxes are full, and 6 of the boxes are half full, how many apples does john have?

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.