Step-by-step explanation:
15 + 6 = 21
21 x 7 - 12 ÷ 2
147 - 6
141
Answer:
51
15 + 6 x 7 - 12 ÷ 2
PEMDAS says multiply and divide from left to right
15 + 42 - 12 ÷ 2
15 + 42 - 6
Now we add from left to right
57 -6
