Which of the following is equivalent to negative 3, negative 2 x, minus, 2,, symbol,, 21 + 3 x?

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?

2and 3 are angles. complementary vertical congruent supplementary

Provide all steps given to find the answer. simplify: 5(2x+9)²