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  • 14-04-2016
  • Mathematics
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50 r 3r 20 I need this by tomorrow morning plz!!!!!

50 r 3r 20 I need this by tomorrow morning plz class=

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penfila11Pen
penfila11Pen penfila11Pen
  • 14-04-2016
50 + r = 3r + 20
Rearrange on either sides so it is easy to isolate

50 - 20 = 3r - r
30 = 2r

Divide by 2 to isolate r and to find its value

[tex] \frac{30}{2} [/tex] = [tex] \frac{2r}{2} [/tex]
2 and 2 cancels out

15 = r

Check, if you want :)
50 + (15) = 3(15) + 20
65 = 45 + 20
65 = 65
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