Can someone help me with this equation plsss

For the equations below which statement is true ?

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?

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?