Find the value of the variable by systematic method.
3y-4=16.
Finding the value of y is
3y-4=16
3y=16+4
3y=20
y=203
Hence the value of y is 203.
Find the value of the variable by trail and error method.
3x=16.
Solve the equation x+4=6 by the systematic method.
Solve the equation x+4=514 by the systematic method.
Finding the value of the variable by trail and error method.
x-6=15
Solve the equation x-312=413 by the systematic method.