 # Need some math help

Ok, this is homework related but not my homework. My nephew is asking for help and while I think I should know this it has been so long much past basic arithmetic eludes me. Wanting to be a cool uncle I am looking for help here. Any explanation you might give would be great. I can see what x should be but I am looking for the way to properly show the process here.

Solve for x:

5(7-2x)=20

5(7-2x)=20

35 -20x = 20 [subtract 35 froim both sides]
-20x= -15 [divide both sides by -20]
x =15/20 = .75

5(7-2x)=20

Step by step:

Distribute the 5 to get:

57 - 52x = 20

35 - 10x = 20

Subtract 35 from both sides:

35 - 10x - 35 = 20 - 35

-10x = -15

Multiply by -1:

(-1)(-10x) = (-1)(-15)

10x = 15

Divide by 10:

10x/10 = 15/10

x = 3/2 or 1 1/2

I’d actually divide both sides by 5 first, giving you:

7-2x=4

Subtract 7 from both sides:
-2x=-3

Solve for x by dividing both sides by -2:

x= 1.5

5x2 = 20? My bad. The others got it right.

Thanks all.

I over complicated the problem in my head trying to do too many steps at once (don’t ask…dunno why myself).