What is the answer 4(6/10−1/5)+0.4=

For this kind of problem it'd be better to ask, "how would we evaluate this?
The task here is EVALUATION:  Finding the value of a mathematical expression.

Use Order of Operations rules.  Often dubbed "PEMDAS," these rules start by emphasizing that anything enclosed inside parentheses MUST be done first.  Next come mult. and di.  Last are add'n and subt'n.

In 4(6/10−1/5)+0.4, we MUST combine 6/10 and -1/5 FIRST.

That's the same as 3/5-1/5, or 2/5.  Then the problem looks like:

Evaluate:  4(2/5)+0.4

Now, we MUST multiply before adding or subtracting.  We get

8/5 + 4/10, or 16/10+4/10 = 20/10, or 2 (answer).

You're doing something i dont know how to do but search up on google slope calculator maybe that will get you there

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!