Question

Two friends, Selma and Khalid are revising algebra. Khalid says: 'I am thinking of a number. If you multiply it by 3 and subtract 6, you get the same answer as adding the number to 7'. Call Khalid's number y and form an equation

Answer 1

Equation: 3y - 6 = y + 7

y = 6.5

Explanation:

Step 1: Write out equation

3y - 6 = y + 7

Step 2: Solve for y

2y - 6 = 7

2y = 13

y = 13/2 or 6.5