I don't no the topic but the answer is suppose to be a fraction but the question is 3x + 4 = 16

When solving with one placehoolder (x) try to get the placeholdedr on one side by itself

with equations, you can do anything to both sides (except divide by zero) so that it stays equal

so3x+4=16

subtract 4 from both sides

3x+4-4=16-4

3x=12

divide both sides by 3

3x/3=12/3

x=4

answer, x=4

3x + 4 = 16

3x = 16 - 4

3x = 12 (divide both sides by 3 to get x)

3x/3 = 12/3

x = 4