5x + 6x + 20 = 180
What is x?

What is the frequency of the sinusoidal graph?

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?

During how many months was the difference between the number of days with homework and with no homework greater than 6?