Question

Benjamin solved the equation 3 + x/2 = 10 and justifies each step as shown.

Identify Benjamin’s error and fix his mistake.

Answer 1

He got the right answer, but he kind of did it wrong.

3+x/2=10  simplify both sides of the equation 
1/2x+3=10   Subtract 3 from both sides 
2*(1/2)=2*7 Multiply both sides by 2
x = 14