How do I solve 2x-3y=-1 and y=x-1 with substitution?

2x=y+3 in slope intercept form

if f (1) = - 5 and f (n) = f (n-1) + 7, find the first four terms and the common difference of the sequence

Solve 1/2 (x+5) < 2 -

Dustin estimates it will cost $7,721 annually to attend a public four-year college. He will receive $1,930 in grants. How much is Dustin's estimated annual contribution to his college education?

If x and y are integers and x < y, how do the opposite of y and the opposite x compare?

What is the solution to this equation? 3x - x+8+5x-2=10

Express each of the following as a fraction in lowest terms 1: 3/6 2: 2/8 3: 12/20

Randi earned a profit of $60.00 on her last snow shoveling and salting job. Write an equation that can be solved to find how many hours Randi spent shoveling and salting to earn a profit of $60.00. HINT: Randi charges $25 an hour to shovel and salt.

The lengths of the sides of a triangle are 4, 5, 6. Can the triangle be a right triangle?

Name a big reason Europeans came to the "New World" during the fifteenth and sixteenth centuries?