Answer: 3y + 4
Explanation:
Question: 3(y - 1) + 7
▪︎ BODMAS, (Brackets, of Division, Multiplication, Addition, Subtraction), therefore brackets come first. 3 multiply Y; 3 multiply ( -1 )
3y - 3 + 7
▪︎Now we group numbers with numbers then numbers and letters with numbers and letters.
3y (-3 + 7)
▪︎In this question, since the positive number is bigger than negative number the answer takes the positive sign. You can also use a number line and count seven steps to the right.
Answer: 3y + 4