Which sentence is subjunctive and conditional? i expect that you come on time. if you learn to tell time, you won’t be late anymore. if you are late again, you will be fired. if you start earlier, you will arrive promptly.

i don't think it's a good idea to threaten anyone at all.

substitute y = 2x - 4 to x + 2y = 12:

x + 2(2x - 4) = 12     use distributive property

x + (2)(2x) + () = 12

x + 4x - 8 = 12     add 8 to both sides

5x = 20     divide both sides by 5

x = 4

put the value of x to the first equation:

y = 2(4) - 4

y = 8 - 4

y = 4