r + (-5r) = -4r
Think of the number line
-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6,
Start at '1'(r) and move 5 places to the left (subtraction) you end up on minus '4' (-4r)
Or another way is to start at '-5r' and move 1 place to the right(addition), you end up on minus'4' (-4r) again.
A third methos is to remove the brackets so you have r + - 5r.
When you have a double sign like this, where the signs are different read it as subtract. Hence r - 5r = -4r
The rules for double signs are
If no sign is given read it as plus(+).
5r + r = 6r
5r - 20 = 40 Add 20 to both sides 5r = 60 Divide both sodes by '5' r = 60/5 = 12 r = 12
r+5r+5=-25
5r = 25 is a linear equation in one variable, r. The solution is r = 5.
13r+10=5r-46 r= r = -7
(5r - 4)(5r + 4)
r(r + 5)
I hope you mean "What is the solution for the problem 5R plus 6 equals 36". In that case 5R + 6 = 36 5R = 36 - 6 5R = 30 R = 6
5r + 8 = -12Subtract 8 from each side:5r = -20Divide each side by 5:r = -4
First, translate it into an algebraic equation:4 + 5r = -11Then we subtract 4 from both sides:4 + 5r - 4 = -11 - 4Now we can simplify our numbers together:(4 - 4) + 5r = -11 - 40 + 5r = -155r = -15Now we divide both sides by 5:(5r / 5) = (-15 / 5)r = -3
The answer is -r
5s-r