Question

Can someone please help me with this problem and explain? Thank you!

Answer 1

3(2c + j) - j (change c with -7 and j with -4)
3(2 x (-7) + (-4)) - (-4)
3(-14 + (-4)) - (-4)
3 x (-18) - (-4)
-54 - (-4)
-54 + 4
-50



Answer is -50