Question

Please help me with this and Explain!

Answer 1

So a=25, b=12, c=4, d=4, right?

What you will do is 25 + (12 + 4) x 4
Of course, focus on the one with the parenthesis first.

Answer 2

If a =25 b=12 c=4 d=4
You can just put these numbers
a+(b+c) x d=25+(12+4) x 4=25+16 x 4 =25+64=89