Question

what is 3x+4y=30 how to calculate for x?

Answer 1

isolate the variable. \[3x +4y = 30\] subtract from both sides \[3x = -4y + 30\] divide by three \[x = (-4/3) x + 10\]

Answer 2

oops that should be x = (-4/3)y + 10

sorry

Answer 3

\[x=-4/3y+10,x=10-4y/4, x=2(2n+1),,,,,,,y=-3(n-2) ,where n inz, \]