contestada

at barton high school 45 students are taking japanese. This has been increasing at a rate of 3 students per year. the number of students taking german is 108 and has been decreasing at a rate of 4 students per year at these, when will the number of students taking Japanese equal the number of students taking german

Respuesta :

45 + 3x and 108 - 4x

45 + 3x = 108 - 4x

3x = 108 - 45 - 4x

3x = 63 - 4x

9x = 63

x = 63/9

x = 7