0
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(+).
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What is 5r plus r?
5r + r = 6r
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5r - 20 = 40 Add 20 to both sides 5r = 60 Divide both sodes by '5' r = 60/5 = 12 r = 12
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r+5r+5=-25
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13r+10=5r-46 r= r = -7
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r(r + 5)
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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
-12 equals 5r plus 8?
5r + 8 = -12Subtract 8 from each side:5r = -20Divide each side by 5:r = -4
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The answer is -r
6r plus 5s-5r equals?
5s-r
