Choose the expression that completes the equation. 30 ÷ 2 + 10 = 7(2 + 1) 6(3 + 7) 5(4 + 1) 3(2 + 3)

Answer question above and explain each step : )

Which one is the correct answer, and why?

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?