At the end of a conference, the attendants were asked if they are planning to attend this conference next year. The ratio of ‘Yes’ to ‘No’ answers was 7 to 9. If 320 people gave either a 'Yes' or 'No' answer, then how many of these people answered 'Yes'?

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?