Solving a simultaneous equation algebraically

Maths

If x=3 and 2x+5y=41, what is the value of y?

7x+2y=24 AND 4x+2y=18.  Find the value of 3x

7x+2y=24 AND 4x + 2y = 18. Find the value of y

If x=2 and y=3, what is the value of 2x+3y?

Use substitution to decide which of the following are solutions to x+y=3.

Use substitution to decide which of the following is the solution to x+y=3 and 3x+4y=10.

Use substitution to decide which of the following is the solution to x+y=3 and 5y+3x=15.