PlsHurry Blanck Is 7 times as much as 4

What is the solution to the system of the equations? x = y - 3 x + 3y = 13

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

Solve the equation for x.3(6x - 1) = 12 i've tried doing the math and i can't find out what i'm doing wrong